util

Documentation

Index

• func AddDefaultRoute(gw net.IP, dev netlink.Link) error
• func AddHostRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error
• func AddRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error
• func DelLinkByName(ifName string) error
• func DelLinkByNameAddr(ifName string, family int) (*net.IPNet, error)
• func NextIP(ip net.IP) net.IP
• func ParseCIDR(s string) (*net.IPNet, error)
• func PrevIP(ip net.IP) net.IP
• func SetNS(f *os.File, flags uintptr) error
• func SetupIPMasq(ipn *net.IPNet, chain string) error
• func SetupVeth(entropy, contVethName string, mtu int, hostNS *os.File) (hostVeth, contVeth netlink.Link, err error)
• func TeardownIPMasq(ipn *net.IPNet, chain string) error
• func WithNetNSPath(nspath string, f func(*os.File) error) error

Functions

func AddDefaultRoute

func AddDefaultRoute(gw net.IP, dev netlink.Link) error

AddDefaultRoute sets the default route on the given gateway.

func AddHostRoute

func AddHostRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error

AddHostRoute adds a host-scoped route to a device.

func AddRoute

func AddRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error

AddRoute adds a universally-scoped route to a device.

func DelLinkByName

func DelLinkByName(ifName string) error

DelLinkByName removes an interface link.

func DelLinkByNameAddr

func DelLinkByNameAddr(ifName string, family int) (*net.IPNet, error)

DelLinkByNameAddr remove an interface returns its IP address of the specified family

func NextIP

func NextIP(ip net.IP) net.IP

func ParseCIDR

func ParseCIDR(s string) (*net.IPNet, error)

ParseCIDR invokes net.ParseCIDR.

func PrevIP

func PrevIP(ip net.IP) net.IP

func SetNS

func SetNS(f *os.File, flags uintptr) error

SetNS sets the network namespace on a target file.

func SetupIPMasq

func SetupIPMasq(ipn *net.IPNet, chain string) error

Installs iptables rules to masquerade traffic coming from ipn and going outside of it

func SetupVeth

func SetupVeth(entropy, contVethName string, mtu int, hostNS *os.File) (hostVeth, contVeth netlink.Link, err error)

SetupVeth sets up a virtual ethernet link. Should be in container netns. TODO(eyakubovich): get rid of entropy and ask kernel to pick name via pattern

func TeardownIPMasq

func TeardownIPMasq(ipn *net.IPNet, chain string) error

Undoes the effects of SetupIPMasq

func WithNetNSPath

func WithNetNSPath(nspath string, f func(*os.File) error) error

WithNetNSPath executes the passed closure under the given network namespace, restoring the original namespace afterwards.