package iptables

import "github.com/docker/docker/libnetwork/iptables"

Index ¶

• Constants
• Variables
• func AddInterfaceFirewalld(intf string) error
• func DelInterfaceFirewalld(intf string) error
• func DeleteConntrackEntries(nlh *netlink.Handle, ipv4List []net.IP, ipv6List []net.IP) (uint, uint, error)
• func DeleteConntrackEntriesByPort(nlh *netlink.Handle, proto types.Protocol, ports []uint16) error
• func FirewalldInit() error
• func IsConntrackProgrammable(nlh *netlink.Handle) bool
• func OnReloaded(callback func())
• func Passthrough(ipv IPV, args ...string) ([]byte, error)
• type Action
• type ChainError
• func (e ChainError) Error() string
• type ChainInfo
• func (c *ChainInfo) Forward(action Action, ip net.IP, port int, proto, destAddr string, destPort int, bridgeName string) error
• func (c *ChainInfo) Link(action Action, ip1, ip2 net.IP, port int, proto string, bridgeName string) error
• func (c *ChainInfo) Output(action Action, args ...string) error
• func (c *ChainInfo) Prerouting(action Action, args ...string) error
• func (c *ChainInfo) Remove() error
• type Conn
• type IPTable
• func GetIptable(version IPVersion) *IPTable
• func (iptable IPTable) AddReturnRule(chain string) error
• func (iptable IPTable) EnsureJumpRule(fromChain, toChain string) error
• func (iptable IPTable) ExistChain(chain string, table Table) bool
• func (iptable IPTable) Exists(table Table, chain string, rule ...string) bool
• func (iptable IPTable) ExistsNative(table Table, chain string, rule ...string) bool
• func (iptable IPTable) LoopbackByVersion() string
• func (iptable IPTable) NewChain(name string, table Table, hairpinMode bool) (*ChainInfo, error)
• func (iptable IPTable) ProgramChain(c *ChainInfo, bridgeName string, hairpinMode, enable bool) error
• func (iptable IPTable) ProgramRule(table Table, chain string, action Action, args []string) error
• func (iptable IPTable) Raw(args ...string) ([]byte, error)
• func (iptable IPTable) RawCombinedOutput(args ...string) error
• func (iptable IPTable) RawCombinedOutputNative(args ...string) error
• func (iptable IPTable) RemoveExistingChain(name string, table Table) error
• func (iptable IPTable) SetDefaultPolicy(table Table, chain string, policy Policy) error
• type IPV
• type IPVersion
• type Policy
• type Table
• type ZoneSettings

Constants ¶

const (
	// Append appends the rule at the end of the chain.
	Append Action = "-A"
	// Delete deletes the rule from the chain.
	Delete Action = "-D"
	// Insert inserts the rule at the top of the chain.
	Insert Action = "-I"
	// Nat table is used for nat translation rules.
	Nat Table = "nat"
	// Filter table is used for filter rules.
	Filter Table = "filter"
	// Mangle table is used for mangling the packet.
	Mangle Table = "mangle"
	// Drop is the default iptables DROP policy
	Drop Policy = "DROP"
	// Accept is the default iptables ACCEPT policy
	Accept Policy = "ACCEPT"
	// IPv4 is version 4
	IPv4 IPVersion = "IPV4"
	// IPv6 is version 6
	IPv6 IPVersion = "IPV6"
)

Variables ¶

var (
	// ErrConntrackNotConfigurable means that conntrack module is not loaded or does not have the netlink module loaded
	ErrConntrackNotConfigurable = errors.New("conntrack is not available")
)

var (

	// ErrIptablesNotFound is returned when the rule is not found.
	ErrIptablesNotFound = errors.New("Iptables not found")
)

Functions ¶

func AddInterfaceFirewalld ¶

func AddInterfaceFirewalld(intf string) error

AddInterfaceFirewalld adds the interface to the trusted zone

func DelInterfaceFirewalld ¶

func DelInterfaceFirewalld(intf string) error

DelInterfaceFirewalld removes the interface from the trusted zone

func DeleteConntrackEntries ¶

func DeleteConntrackEntries(nlh *netlink.Handle, ipv4List []net.IP, ipv6List []net.IP) (uint, uint, error)

DeleteConntrackEntries deletes all the conntrack connections on the host for the specified IP Returns the number of flows deleted for IPv4, IPv6 else error

func DeleteConntrackEntriesByPort ¶

func DeleteConntrackEntriesByPort(nlh *netlink.Handle, proto types.Protocol, ports []uint16) error

func FirewalldInit ¶

func FirewalldInit() error

FirewalldInit initializes firewalld management code.

func IsConntrackProgrammable ¶

func IsConntrackProgrammable(nlh *netlink.Handle) bool

IsConntrackProgrammable returns true if the handle supports the NETLINK_NETFILTER and the base modules are loaded

func OnReloaded ¶

func OnReloaded(callback func())

OnReloaded add callback

func Passthrough ¶

func Passthrough(ipv IPV, args ...string) ([]byte, error)

Passthrough method simply passes args through to iptables/ip6tables

Types ¶

type Action ¶

type Action string

Action signifies the iptable action.

type ChainError ¶

type ChainError struct {
	Chain  string
	Output []byte
}

ChainError is returned to represent errors during ip table operation.

func (ChainError) Error ¶

func (e ChainError) Error() string

type ChainInfo ¶

type ChainInfo struct {
	Name        string
	Table       Table
	HairpinMode bool
	IPTable     IPTable
}

ChainInfo defines the iptables chain.

func (*ChainInfo) Forward ¶

func (c *ChainInfo) Forward(action Action, ip net.IP, port int, proto, destAddr string, destPort int, bridgeName string) error

Forward adds forwarding rule to 'filter' table and corresponding nat rule to 'nat' table.

func (*ChainInfo) Link ¶

func (c *ChainInfo) Link(action Action, ip1, ip2 net.IP, port int, proto string, bridgeName string) error

Link adds reciprocal ACCEPT rule for two supplied IP addresses. Traffic is allowed from ip1 to ip2 and vice-versa

func (*ChainInfo) Output ¶

func (c *ChainInfo) Output(action Action, args ...string) error

Output adds linking rule to an OUTPUT chain.

func (*ChainInfo) Prerouting ¶

func (c *ChainInfo) Prerouting(action Action, args ...string) error

Prerouting adds linking rule to nat/PREROUTING chain.

func (*ChainInfo) Remove ¶

func (c *ChainInfo) Remove() error

Remove removes the chain.

type Conn ¶

type Conn struct {
	// contains filtered or unexported fields
}

Conn is a connection to firewalld dbus endpoint.

type IPTable ¶

type IPTable struct {
	Version IPVersion
}

IPTable defines struct with IPVersion

func GetIptable ¶

func GetIptable(version IPVersion) *IPTable

GetIptable returns an instance of IPTable with specified version

func (IPTable) AddReturnRule ¶

func (iptable IPTable) AddReturnRule(chain string) error

AddReturnRule adds a return rule for the chain in the filter table

func (IPTable) EnsureJumpRule ¶

func (iptable IPTable) EnsureJumpRule(fromChain, toChain string) error

EnsureJumpRule ensures the jump rule is on top

func (IPTable) ExistChain ¶

func (iptable IPTable) ExistChain(chain string, table Table) bool

ExistChain checks if a chain exists

func (IPTable) Exists ¶

func (iptable IPTable) Exists(table Table, chain string, rule ...string) bool

Exists checks if a rule exists

func (IPTable) ExistsNative ¶

func (iptable IPTable) ExistsNative(table Table, chain string, rule ...string) bool

ExistsNative behaves as Exists with the difference it will always invoke `iptables` binary.

func (IPTable) LoopbackByVersion ¶

func (iptable IPTable) LoopbackByVersion() string

LoopbackByVersion returns loopback address by version

func (IPTable) NewChain ¶

func (iptable IPTable) NewChain(name string, table Table, hairpinMode bool) (*ChainInfo, error)

NewChain adds a new chain to ip table.

func (IPTable) ProgramChain ¶

func (iptable IPTable) ProgramChain(c *ChainInfo, bridgeName string, hairpinMode, enable bool) error

ProgramChain is used to add rules to a chain

func (IPTable) ProgramRule ¶

func (iptable IPTable) ProgramRule(table Table, chain string, action Action, args []string) error

ProgramRule adds the rule specified by args only if the rule is not already present in the chain. Reciprocally, it removes the rule only if present.

func (IPTable) Raw ¶

func (iptable IPTable) Raw(args ...string) ([]byte, error)

Raw calls 'iptables' system command, passing supplied arguments.

func (IPTable) RawCombinedOutput ¶

func (iptable IPTable) RawCombinedOutput(args ...string) error

RawCombinedOutput internally calls the Raw function and returns a non nil error if Raw returned a non nil error or a non empty output

func (IPTable) RawCombinedOutputNative ¶

func (iptable IPTable) RawCombinedOutputNative(args ...string) error

RawCombinedOutputNative behave as RawCombinedOutput with the difference it will always invoke `iptables` binary

func (IPTable) RemoveExistingChain ¶

func (iptable IPTable) RemoveExistingChain(name string, table Table) error

RemoveExistingChain removes existing chain from the table.

func (IPTable) SetDefaultPolicy ¶

func (iptable IPTable) SetDefaultPolicy(table Table, chain string, policy Policy) error

SetDefaultPolicy sets the passed default policy for the table/chain

type IPV ¶

type IPV string

IPV defines the table string

const (
	// Iptables point ipv4 table
	Iptables IPV = "ipv4"
	// IP6Tables point to ipv6 table
	IP6Tables IPV = "ipv6"
	// Ebtables point to bridge table
	Ebtables IPV = "eb"
)

type IPVersion ¶

type IPVersion string

IPVersion refers to IP version, v4 or v6

type Policy ¶

type Policy string

Policy is the default iptable policies

type Table ¶

type Table string

Table refers to Nat, Filter or Mangle.

type ZoneSettings ¶

type ZoneSettings struct {
	// contains filtered or unexported fields
}

ZoneSettings holds the firewalld zone settings, documented in https://firewalld.org/documentation/man-pages/firewalld.dbus.html

Source Files ¶

conntrack.go firewalld.go iptables.go