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Merge pull request #639 from EdDev/bridge-macspoofchk

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bridge: Add macspoofchk support
This commit is contained in:
Matt Dupre
2021-10-06 08:39:10 -07:00
committed by GitHub
parent 2a9114d1af 081ed44a1d
commit f1f128e3c9
24 changed files with 2132 additions and 14 deletions
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Apache License
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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package nft
import (
"github.com/networkplumbing/go-nft/nft/schema"
)
type ChainType string
type ChainHook string
type ChainPolicy string
// Chain Types
const (
TypeFilter ChainType = schema.TypeFilter
TypeNAT ChainType = schema.TypeNAT
TypeRoute ChainType = schema.TypeRoute
)
// Chain Hooks
const (
HookPreRouting ChainHook = schema.HookPreRouting
HookInput ChainHook = schema.HookInput
HookOutput ChainHook = schema.HookOutput
HookForward ChainHook = schema.HookForward
HookPostRouting ChainHook = schema.HookPostRouting
HookIngress ChainHook = schema.HookIngress
)
// Chain Policies
const (
PolicyAccept ChainPolicy = schema.PolicyAccept
PolicyDrop ChainPolicy = schema.PolicyDrop
)
// NewRegularChain returns a new schema chain structure for a regular chain.
func NewRegularChain(table *schema.Table, name string) *schema.Chain {
return NewChain(table, name, nil, nil, nil, nil)
}
// NewChain returns a new schema chain structure for a base chain.
// For base chains, all arguments are required except the policy.
// Missing arguments will cause an error once the config is applied.
func NewChain(table *schema.Table, name string, ctype *ChainType, hook *ChainHook, prio *int, policy *ChainPolicy) *schema.Chain {
c := &schema.Chain{
Family: table.Family,
Table: table.Name,
Name: name,
}
if ctype != nil {
c.Type = string(*ctype)
}
if hook != nil {
c.Hook = string(*hook)
}
if prio != nil {
c.Prio = prio
}
if policy != nil {
c.Policy = string(*policy)
}
return c
}

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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package nft
import (
nftconfig "github.com/networkplumbing/go-nft/nft/config"
nftexec "github.com/networkplumbing/go-nft/nft/exec"
)
type Config = nftconfig.Config
// NewConfig returns a new nftables config structure.
func NewConfig() *nftconfig.Config {
return nftconfig.New()
}
// ReadConfig loads the nftables configuration from the system and
// returns it as a nftables config structure.
// The system is expected to have the `nft` executable deployed and nftables enabled in the kernel.
func ReadConfig() (*Config, error) {
return nftexec.ReadConfig()
}
// ApplyConfig applies the given nftables config on the system.
// The system is expected to have the `nft` executable deployed and nftables enabled in the kernel.
func ApplyConfig(c *Config) error {
return nftexec.ApplyConfig(c)
}

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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package config
import (
"github.com/networkplumbing/go-nft/nft/schema"
)
// AddChain appends the given chain to the nftable config.
// The chain is added without an explicit action (`add`).
// Adding multiple times the same chain has no affect when the config is applied.
func (c *Config) AddChain(chain *schema.Chain) {
nftable := schema.Nftable{Chain: chain}
c.Nftables = append(c.Nftables, nftable)
}
// DeleteChain appends a given chain to the nftable config
// with the `delete` action.
// Attempting to delete a non-existing chain, results with a failure when the config is applied.
// The chain must not contain any rules or be used as a jump target.
func (c *Config) DeleteChain(chain *schema.Chain) {
nftable := schema.Nftable{Delete: &schema.Objects{Chain: chain}}
c.Nftables = append(c.Nftables, nftable)
}
// FlushChain appends a given chain to the nftable config
// with the `flush` action.
// All rules under the chain are removed (when applied).
// Attempting to flush a non-existing chain, results with a failure when the config is applied.
func (c *Config) FlushChain(chain *schema.Chain) {
nftable := schema.Nftable{Flush: &schema.Objects{Chain: chain}}
c.Nftables = append(c.Nftables, nftable)
}
// LookupChain searches the configuration for a matching chain and returns it.
// The chain is matched first by the table and chain name.
// Other matching fields are optional (for matching base chains).
// Mutating the returned chain will result in mutating the configuration.
func (c *Config) LookupChain(toFind *schema.Chain) *schema.Chain {
for _, nftable := range c.Nftables {
if chain := nftable.Chain; chain != nil {
match := chain.Table == toFind.Table && chain.Family == toFind.Family && chain.Name == toFind.Name
if match {
if t := toFind.Type; t != "" {
match = match && chain.Type == t
}
if h := toFind.Hook; h != "" {
match = match && chain.Hook == h
}
if p := toFind.Prio; p != nil {
match = match && chain.Prio != nil && *chain.Prio == *p
}
if p := toFind.Policy; p != "" {
match = match && chain.Policy == p
}
if match {
return chain
}
}
}
}
return nil
}

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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package config
import (
"encoding/json"
"github.com/networkplumbing/go-nft/nft/schema"
)
type Config struct {
schema.Root
}
// New returns a new nftables config structure.
func New() *Config {
c := &Config{}
c.Nftables = []schema.Nftable{}
return c
}
// ToJSON returns the JSON encoding of the nftables config.
func (c *Config) ToJSON() ([]byte, error) {
return json.Marshal(*c)
}
// FromJSON decodes the provided JSON-encoded data and populates the nftables config.
func (c *Config) FromJSON(data []byte) error {
if err := json.Unmarshal(data, c); err != nil {
return err
}
return nil
}
// FlushRuleset adds a command to the nftables config that erases all the configuration when applied.
// It is commonly used as the first config instruction, followed by a declarative configuration.
// When used, any previous configuration is flushed away before adding the new one.
// Calling FlushRuleset updates the configuration and will take effect only
// when applied on the system.
func (c *Config) FlushRuleset() {
c.Nftables = append(c.Nftables, schema.Nftable{Flush: &schema.Objects{Ruleset: true}})
}

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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package config
import (
"bytes"
"encoding/json"
"github.com/networkplumbing/go-nft/nft/schema"
)
// AddRule appends the given rule to the nftable config.
// The rule is added without an explicit action (`add`).
// Adding multiple times the same rule will result in multiple identical rules when applied.
func (c *Config) AddRule(rule *schema.Rule) {
nftable := schema.Nftable{Rule: rule}
c.Nftables = append(c.Nftables, nftable)
}
// DeleteRule appends a given rule to the nftable config
// with the `delete` action.
// A rule is identified by its handle ID and it must be present in the given rule.
// Attempting to delete a non-existing rule, results with a failure when the config is applied.
// A common usage is to use LookupRule() and then to pass the result to DeleteRule.
func (c *Config) DeleteRule(rule *schema.Rule) {
nftable := schema.Nftable{Delete: &schema.Objects{Rule: rule}}
c.Nftables = append(c.Nftables, nftable)
}
// LookupRule searches the configuration for a matching rule and returns it.
// The rule is matched first by the table and chain.
// Other matching fields are optional (nil or an empty string arguments imply no-matching).
// Mutating the returned chain will result in mutating the configuration.
func (c *Config) LookupRule(toFind *schema.Rule) []*schema.Rule {
var rules []*schema.Rule
for _, nftable := range c.Nftables {
if r := nftable.Rule; r != nil {
match := r.Table == toFind.Table && r.Family == toFind.Family && r.Chain == toFind.Chain
if match {
if h := toFind.Handle; h != nil {
match = match && r.Handle != nil && *r.Handle == *h
}
if i := toFind.Index; i != nil {
match = match && r.Index != nil && *r.Index == *i
}
if co := toFind.Comment; co != "" {
match = match && r.Comment == co
}
if toFindStatements := toFind.Expr; toFindStatements != nil {
if match = match && len(toFindStatements) == len(r.Expr); match {
for i, toFindStatement := range toFindStatements {
equal, err := areStatementsEqual(toFindStatement, r.Expr[i])
match = match && err == nil && equal
}
}
}
if match {
rules = append(rules, r)
}
}
}
}
return rules
}
func areStatementsEqual(statementA, statementB schema.Statement) (bool, error) {
statementARow, err := json.Marshal(statementA)
if err != nil {
return false, err
}
statementBRow, err := json.Marshal(statementB)
if err != nil {
return false, err
}
return bytes.Equal(statementARow, statementBRow), nil
}

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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package config
import (
"github.com/networkplumbing/go-nft/nft/schema"
)
// AddTable appends the given table to the nftable config.
// The table is added without an explicit action (`add`).
// Adding multiple times the same table has no effect when the config is applied.
func (c *Config) AddTable(table *schema.Table) {
nftable := schema.Nftable{Table: table}
c.Nftables = append(c.Nftables, nftable)
}
// DeleteTable appends a given table to the nftable config
// with the `delete` action.
// Attempting to delete a non-existing table, results with a failure when the config is applied.
// All chains and rules under the table are removed as well (when applied).
func (c *Config) DeleteTable(table *schema.Table) {
nftable := schema.Nftable{Delete: &schema.Objects{Table: table}}
c.Nftables = append(c.Nftables, nftable)
}
// FlushTable appends a given table to the nftable config
// with the `flush` action.
// All chains and rules under the table are removed (when applied).
// Attempting to flush a non-existing table, results with a failure when the config is applied.
func (c *Config) FlushTable(table *schema.Table) {
nftable := schema.Nftable{Flush: &schema.Objects{Table: table}}
c.Nftables = append(c.Nftables, nftable)
}
// LookupTable searches the configuration for a matching table and returns it.
// Mutating the returned table will result in mutating the configuration.
func (c *Config) LookupTable(toFind *schema.Table) *schema.Table {
for _, nftable := range c.Nftables {
if t := nftable.Table; t != nil {
if t.Name == toFind.Name && t.Family == toFind.Family {
return t
}
}
}
return nil
}

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vendor/github.com/networkplumbing/go-nft/nft/doc.go generated vendored Normal file
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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
// Package nft provides a GO API to nftables.
// Together with the schema package, it allows to build, read and apply
// nftables configuration on a supporting system.
//
// The schema structures are based on libnftables-json (https://www.mankier.com/5/libnftables-json)
// and implement a subset of them.
//
// To create a new configuration, use `NewConfig` followed by methods
// which populates the configuration with tables, chains and rules, accompanied
// to specific actions (add, delete, flush).
//
// config := nft.NewConfig()
// table := nft.NewTable("mytable", nft.FamilyIP)
// config.AddTable(table)
// chain := nft.NewRegularChain(table, "mychain")
// config.AddChain(chain)
// rule := nft.NewRule(table, chain, statements, nil, nil, "mycomment")
//
// To apply a configuration on the system, use the `ApplyConfig` function.
// err := nft.ApplyConfig(config)
//
// To read the configuration from the system, use the `ReadConfig` function.
// config, err := nft.ReadConfig()
//
// For full setup example, see the integration test: tests/config_test.go
//
// The nft package is dependent on the `nft` binary and the kernel nftables
// support.
package nft

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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package exec
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"os/exec"
"strings"
nftconfig "github.com/networkplumbing/go-nft/nft/config"
)
const (
cmdBin = "nft"
cmdFile = "-f"
cmdJSON = "-j"
cmdList = "list"
cmdRuleset = "ruleset"
)
// ReadConfig loads the nftables configuration from the system and
// returns it as a nftables config structure.
// The system is expected to have the `nft` executable deployed and nftables enabled in the kernel.
func ReadConfig() (*nftconfig.Config, error) {
stdout, err := execCommand(cmdJSON, cmdList, cmdRuleset)
if err != nil {
return nil, err
}
config := nftconfig.New()
if err := config.FromJSON(stdout.Bytes()); err != nil {
return nil, fmt.Errorf("failed to list ruleset: %v", err)
}
return config, nil
}
// ApplyConfig applies the given nftables config on the system.
// The system is expected to have the `nft` executable deployed and nftables enabled in the kernel.
func ApplyConfig(c *nftconfig.Config) error {
data, err := c.ToJSON()
if err != nil {
return err
}
tmpFile, err := ioutil.TempFile(os.TempDir(), "spoofcheck-")
if err != nil {
return fmt.Errorf("failed to create temporary file: %v", err)
}
defer os.Remove(tmpFile.Name())
if _, err = tmpFile.Write(data); err != nil {
return fmt.Errorf("failed to write to temporary file: %v", err)
}
if err := tmpFile.Close(); err != nil {
return fmt.Errorf("failed to close temporary file: %v", err)
}
if _, err := execCommand(cmdJSON, cmdFile, tmpFile.Name()); err != nil {
return err
}
return nil
}
func execCommand(args ...string) (*bytes.Buffer, error) {
cmd := exec.Command(cmdBin, args...)
var stdout, stderr bytes.Buffer
cmd.Stderr = &stderr
cmd.Stdout = &stdout
if err := cmd.Run(); err != nil {
return nil, fmt.Errorf(
"failed to execute %s %s: %v stdout:'%s' stderr:'%s'",
cmd.Path, strings.Join(cmd.Args, " "), err, stdout.String(), stderr.String(),
)
}
return &stdout, nil
}

58
vendor/github.com/networkplumbing/go-nft/nft/rule.go generated vendored Normal file
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/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package nft
import (
"github.com/networkplumbing/go-nft/nft/schema"
)
// NewRule returns a new schema rule structure.
func NewRule(table *schema.Table, chain *schema.Chain, expr []schema.Statement, handle *int, index *int, comment string) *schema.Rule {
c := &schema.Rule{
Family: table.Family,
Table: table.Name,
Chain: chain.Name,
Expr: expr,
Handle: handle,
Index: index,
Comment: comment,
}
return c
}
type RuleIndex int
// NewRuleIndex returns a rule index object which acts as an iterator.
// When multiple rules are added to a chain, index allows to define an order between them.
// The first rule which is added to a chain should have no index (it is assigned index 0),
// following rules should have the index set, referencing after/before which rule the new one is to be added/inserted.
func NewRuleIndex() *RuleIndex {
var index RuleIndex = -1
return &index
}
// Next returns the next iteration value as an integer pointer.
// When first time called, it returns the value 0.
func (i *RuleIndex) Next() *int {
*i++
var index = int(*i)
return &index
}

53
vendor/github.com/networkplumbing/go-nft/nft/schema/chain.go generated vendored Normal file
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@ -0,0 +1,53 @@
/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package schema
// Chain Types
const (
TypeFilter = "filter"
TypeNAT = "nat"
TypeRoute = "route"
)
// Chain Hooks
const (
HookPreRouting = "prerouting"
HookInput = "input"
HookOutput = "output"
HookForward = "forward"
HookPostRouting = "postrouting"
HookIngress = "ingress"
)
// Chain Policies
const (
PolicyAccept = "accept"
PolicyDrop = "drop"
)
type Chain struct {
Family string `json:"family"`
Table string `json:"table"`
Name string `json:"name"`
Type string `json:"type,omitempty"`
Hook string `json:"hook,omitempty"`
Prio *int `json:"prio,omitempty"`
Policy string `json:"policy,omitempty"`
}

366
vendor/github.com/networkplumbing/go-nft/nft/schema/rule.go generated vendored Normal file
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@ -0,0 +1,366 @@
/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package schema
import (
"encoding/json"
"fmt"
)
type Rule struct {
Family string `json:"family"`
Table string `json:"table"`
Chain string `json:"chain"`
Expr []Statement `json:"expr,omitempty"`
Handle *int `json:"handle,omitempty"`
Index *int `json:"index,omitempty"`
Comment string `json:"comment,omitempty"`
}
type Statement struct {
Counter *Counter `json:"counter,omitempty"`
Match *Match `json:"match,omitempty"`
Verdict
Nat
}
type Counter struct {
Packets int `json:"packets"`
Bytes int `json:"bytes"`
}
type Nat struct {
Snat *Snat `json:"snat,omitempty"`
Dnat *Dnat `json:"dnat,omitempty"`
Masquerade *Masquerade `json:"masquerade,omitempty"`
Redirect *Redirect `json:"redirect,omitempty"`
}
type Snat struct {
Addr *Expression `json:"addr,omitempty"`
Family *string `json:"family,omitempty"`
Port *Expression `json:"port,omitempty"`
Flags *Flags `json:"flags,omitempty"`
}
type Dnat struct {
Addr *Expression `json:"addr,omitempty"`
Family *string `json:"family,omitempty"`
Port *Expression `json:"port,omitempty"`
Flags *Flags `json:"flags,omitempty"`
}
const masquerade = "masquerade"
type Masquerade struct {
Enabled bool `json:"-"`
Port *Expression `json:"port,omitempty"`
Flags *Flags `json:"flags,omitempty"`
}
const redirect = "redirect"
type Redirect struct {
Enabled bool `json:"-"`
Port *Expression `json:"port,omitempty"`
Flags *Flags `json:"flags,omitempty"`
}
type Flags struct {
Flags []string `json:"-"`
}
// NAT Flags
const (
NATFlagRandom = "random"
NATFlagFullyRandom = "fully-random"
NATFlagPersistent = "persistent"
)
type Verdict struct {
SimpleVerdict
Jump *ToTarget `json:"jump,omitempty"`
Goto *ToTarget `json:"goto,omitempty"`
}
type SimpleVerdict struct {
Accept bool `json:"-"`
Continue bool `json:"-"`
Drop bool `json:"-"`
Return bool `json:"-"`
}
type ToTarget struct {
Target string `json:"target"`
}
type Match struct {
Op string `json:"op"`
Left Expression `json:"left"`
Right Expression `json:"right"`
}
type Expression struct {
String *string `json:"-"`
Bool *bool `json:"-"`
Float64 *float64 `json:"-"`
Payload *Payload `json:"payload,omitempty"`
// RowData accepts arbitrary data which cannot be composed from the existing schema.
// Use `json.RawMessage()` or `[]byte()` for the value.
// Example:
// `schema.Expression{RowData: json.RawMessage(`{"meta":{"key":"iifname"}}`)}`
RowData json.RawMessage `json:"-"`
}
type Payload struct {
Protocol string `json:"protocol"`
Field string `json:"field"`
}
// Verdict Operations
const (
VerdictAccept = "accept"
VerdictContinue = "continue"
VerdictDrop = "drop"
VerdictReturn = "return"
)
// Match Operators
const (
OperAND = "&" // Binary AND
OperOR = "|" // Binary OR
OperXOR = "^" // Binary XOR
OperLSH = "<<" // Left shift
OperRSH = ">>" // Right shift
OperEQ = "==" // Equal
OperNEQ = "!=" // Not equal
OperLS = "<" // Less than
OperGR = ">" // Greater than
OperLSE = "<=" // Less than or equal to
OperGRE = ">=" // Greater than or equal to
OperIN = "in" // Perform a lookup, i.e. test if bits on RHS are contained in LHS value
)
// Payload Expressions
const (
PayloadKey = "payload"
// Ethernet
PayloadProtocolEther = "ether"
PayloadFieldEtherDAddr = "daddr"
PayloadFieldEtherSAddr = "saddr"
PayloadFieldEtherType = "type"
// IP (common)
PayloadFieldIPVer = "version"
PayloadFieldIPDscp = "dscp"
PayloadFieldIPEcn = "ecn"
PayloadFieldIPLen = "length"
PayloadFieldIPSAddr = "saddr"
PayloadFieldIPDAddr = "daddr"
// IPv4
PayloadProtocolIP4 = "ip"
PayloadFieldIP4HdrLen = "hdrlength"
PayloadFieldIP4Id = "id"
PayloadFieldIP4FragOff = "frag-off"
PayloadFieldIP4Ttl = "ttl"
PayloadFieldIP4Protocol = "protocol"
PayloadFieldIP4Chksum = "checksum"
// IPv6
PayloadProtocolIP6 = "ip6"
PayloadFieldIP6FlowLabel = "flowlabel"
PayloadFieldIP6NextHdr = "nexthdr"
PayloadFieldIP6HopLimit = "hoplimit"
)
func (s Statement) MarshalJSON() ([]byte, error) {
type _Statement Statement
statement := _Statement(s)
// Convert to a dynamic structure
data, err := json.Marshal(statement)
if err != nil {
return nil, err
}
dynamicStructure := make(map[string]json.RawMessage)
if err := json.Unmarshal(data, &dynamicStructure); err != nil {
return nil, err
}
switch {
case s.Accept:
dynamicStructure[VerdictAccept] = nil
case s.Continue:
dynamicStructure[VerdictContinue] = nil
case s.Drop:
dynamicStructure[VerdictDrop] = nil
case s.Return:
dynamicStructure[VerdictReturn] = nil
case s.Masquerade != nil && s.Masquerade.Enabled && s.Masquerade.Port == nil && s.Masquerade.Flags == nil:
dynamicStructure[masquerade] = nil
case s.Redirect != nil && s.Redirect.Enabled && s.Redirect.Port == nil && s.Redirect.Flags == nil:
dynamicStructure[redirect] = nil
}
data, err = json.Marshal(dynamicStructure)
if err != nil {
return nil, err
}
return data, nil
}
func (s *Statement) UnmarshalJSON(data []byte) error {
type _Statement Statement
statement := _Statement{}
if err := json.Unmarshal(data, &statement); err != nil {
return err
}
*s = Statement(statement)
dynamicStructure := make(map[string]json.RawMessage)
if err := json.Unmarshal(data, &dynamicStructure); err != nil {
return err
}
_, s.Accept = dynamicStructure[VerdictAccept]
_, s.Continue = dynamicStructure[VerdictContinue]
_, s.Drop = dynamicStructure[VerdictDrop]
_, s.Return = dynamicStructure[VerdictReturn]
if _, masqueradeDefined := dynamicStructure[masquerade]; s.Masquerade == nil && masqueradeDefined {
s.Masquerade = &Masquerade{Enabled: true}
}
if _, redirectDefined := dynamicStructure[redirect]; s.Redirect == nil && redirectDefined {
s.Redirect = &Redirect{Enabled: true}
}
return nil
}
func (e Expression) MarshalJSON() ([]byte, error) {
var dynamicStruct interface{}
switch {
case e.RowData != nil:
return e.RowData, nil
case e.String != nil:
dynamicStruct = *e.String
case e.Float64 != nil:
dynamicStruct = *e.Float64
case e.Bool != nil:
dynamicStruct = *e.Bool
default:
type _Expression Expression
dynamicStruct = _Expression(e)
}
return json.Marshal(dynamicStruct)
}
func (e *Expression) UnmarshalJSON(data []byte) error {
var dynamicStruct interface{}
if err := json.Unmarshal(data, &dynamicStruct); err != nil {
return err
}
switch dynamicStruct.(type) {
case string:
d := dynamicStruct.(string)
e.String = &d
case float64:
d := dynamicStruct.(float64)
e.Float64 = &d
case bool:
d := dynamicStruct.(bool)
e.Bool = &d
case []interface{}:
e.RowData = data
case map[string]interface{}:
type _Expression Expression
expression := _Expression(*e)
if err := json.Unmarshal(data, &expression); err != nil {
return err
}
*e = Expression(expression)
default:
return fmt.Errorf("unsupported field type in expression: %T(%v)", dynamicStruct, dynamicStruct)
}
if e.String == nil && e.Float64 == nil && e.Bool == nil && e.Payload == nil {
e.RowData = data
}
return nil
}
func (f Flags) MarshalJSON() ([]byte, error) {
var dynamicStruct interface{}
switch flagCount := len(f.Flags); {
case flagCount == 1:
dynamicStruct = f.Flags[0]
case flagCount > 1:
dynamicStruct = f.Flags
}
return json.Marshal(dynamicStruct)
}
func (f *Flags) UnmarshalJSON(data []byte) error {
var dynamicStruct interface{}
if err := json.Unmarshal(data, &dynamicStruct); err != nil {
return err
}
switch v := dynamicStruct.(type) {
case string:
f.Flags = []string{v}
case []interface{}:
for _, val := range v {
stringVal, ok := val.(string)
if !ok {
return fmt.Errorf("flags values require string type: %T(%v)", dynamicStruct, dynamicStruct)
}
f.Flags = append(f.Flags, stringVal)
}
default:
return fmt.Errorf("flags values require string type: %T(%v)", dynamicStruct, dynamicStruct)
}
return nil
}
func Accept() Verdict {
return Verdict{SimpleVerdict: SimpleVerdict{Accept: true}}
}
func Continue() Verdict {
return Verdict{SimpleVerdict: SimpleVerdict{Continue: true}}
}
func Drop() Verdict {
return Verdict{SimpleVerdict: SimpleVerdict{Drop: true}}
}
func Return() Verdict {
return Verdict{SimpleVerdict: SimpleVerdict{Return: true}}
}

80
vendor/github.com/networkplumbing/go-nft/nft/schema/schema.go generated vendored Normal file
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@ -0,0 +1,80 @@
/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package schema
import (
"encoding/json"
)
type Root struct {
Nftables []Nftable `json:"nftables"`
}
const ruleSetKey = "ruleset"
type Objects struct {
Table *Table `json:"table,omitempty"`
Chain *Chain `json:"chain,omitempty"`
Rule *Rule `json:"rule,omitempty"`
Ruleset bool `json:"-"`
}
func (o Objects) MarshalJSON() ([]byte, error) {
type _Objects Objects
objects := _Objects(o)
data, err := json.Marshal(objects)
if err != nil {
return nil, err
}
if o.Ruleset {
// Convert to a dynamic structure
var dynamicStructure map[string]json.RawMessage
if err := json.Unmarshal(data, &dynamicStructure); err != nil {
return nil, err
}
dynamicStructure[ruleSetKey] = nil
data, err = json.Marshal(dynamicStructure)
if err != nil {
return nil, err
}
}
return data, nil
}
type Nftable struct {
Table *Table `json:"table,omitempty"`
Chain *Chain `json:"chain,omitempty"`
Rule *Rule `json:"rule,omitempty"`
Add *Objects `json:"add,omitempty"`
Delete *Objects `json:"delete,omitempty"`
Flush *Objects `json:"flush,omitempty"`
Metainfo *Metainfo `json:"metainfo,omitempty"`
}
type Metainfo struct {
Version string `json:"version"`
ReleaseName string `json:"release_name"`
JsonSchemaVersion int `json:"json_schema_version"`
}

35
vendor/github.com/networkplumbing/go-nft/nft/schema/table.go generated vendored Normal file
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@ -0,0 +1,35 @@
/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package schema
// Table Address Families
const (
FamilyIP = "ip" // IPv4 address AddressFamily.
FamilyIP6 = "ip6" // IPv6 address AddressFamily.
FamilyINET = "inet" // Internet (IPv4/IPv6) address AddressFamily.
FamilyARP = "arp" // ARP address AddressFamily, handling IPv4 ARP packets.
FamilyBridge = "bridge" // Bridge address AddressFamily, handling packets which traverse a bridge device.
FamilyNETDEV = "netdev" // Netdev address AddressFamily, handling packets from ingress.
)
type Table struct {
Family string `json:"family"`
Name string `json:"name"`
}

51
vendor/github.com/networkplumbing/go-nft/nft/table.go generated vendored Normal file
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@ -0,0 +1,51 @@
/*
* This file is part of the go-nft project
*
* 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.
*
* Copyright 2021 Red Hat, Inc.
*
*/
package nft
import "github.com/networkplumbing/go-nft/nft/schema"
type AddressFamily string
// Address Families
const (
FamilyIP AddressFamily = schema.FamilyIP
FamilyIP6 AddressFamily = schema.FamilyIP6
FamilyINET AddressFamily = schema.FamilyINET
FamilyARP AddressFamily = schema.FamilyARP
FamilyBridge AddressFamily = schema.FamilyBridge
FamilyNETDEV AddressFamily = schema.FamilyNETDEV
)
type TableAction string
// Table Actions
const (
TableADD TableAction = "add"
TableDELETE TableAction = "delete"
TableFLUSH TableAction = "flush"
)
// NewTable returns a new schema table structure.
func NewTable(name string, family AddressFamily) *schema.Table {
return &schema.Table{
Name: name,
Family: string(family),
}
}

6
vendor/modules.txt vendored
View File

@ -84,6 +84,12 @@ github.com/j-keck/arping
# github.com/mattn/go-shellwords v1.0.12
## explicit
github.com/mattn/go-shellwords
# github.com/networkplumbing/go-nft v0.2.0
## explicit
github.com/networkplumbing/go-nft/nft
github.com/networkplumbing/go-nft/nft/config
github.com/networkplumbing/go-nft/nft/exec
github.com/networkplumbing/go-nft/nft/schema
# github.com/nxadm/tail v1.4.8
github.com/nxadm/tail
github.com/nxadm/tail/ratelimiter