Documentation
¶
Index ¶
- Constants
- Variables
- func AppendPortIfNeeded(addr string, port int32) string
- func BuildPortsToEndpointsMap(endpoints *v1.Endpoints) map[string][]string
- func EnsureSysctl(sysctl utilsysctl.Interface, name string, newVal int) error
- func FilterIncorrectCIDRVersion(ipStrings []string, isIPv6Mode bool) ([]string, []string)
- func FilterIncorrectIPVersion(ipStrings []string, isIPv6Mode bool) ([]string, []string)
- func GetLocalAddrs() ([]net.IP, error)
- func GetNodeAddresses(cidrs []string, nw NetworkInterfacer) (sets.String, error)
- func IPPart(s string) string
- func IsProxyableHostname(ctx context.Context, resolv Resolver, hostname string) error
- func IsProxyableIP(ip string) error
- func IsZeroCIDR(cidr string) bool
- func LogAndEmitIncorrectIPVersionEvent(recorder record.EventRecorder, ...)
- func PortPart(s string) (int, error)
- func RevertPorts(replacementPortsMap, originalPortsMap map[LocalPort]Closeable)
- func ShouldSkipService(service *v1.Service) bool
- func ShuffleStrings(s []string) []string
- func ToCIDR(ip net.IP) string
- type Closeable
- type LocalPort
- type NetworkInterfacer
- type PortOpener
- type RealNetwork
- type Resolver
Constants ¶
const ( // IPv4ZeroCIDR is the CIDR block for the whole IPv4 address space IPv4ZeroCIDR = "0.0.0.0/0" // IPv6ZeroCIDR is the CIDR block for the whole IPv6 address space IPv6ZeroCIDR = "::/0" )
Variables ¶
var ( // ErrAddressNotAllowed indicates the address is not allowed ErrAddressNotAllowed = errors.New("address not allowed") // ErrNoAddresses indicates there are no addresses for the hostname ErrNoAddresses = errors.New("No addresses for hostname") )
Functions ¶
func AppendPortIfNeeded ¶
AppendPortIfNeeded appends the given port to IP address unless it is already in "ipv4:port" or "[ipv6]:port" format.
func BuildPortsToEndpointsMap ¶
BuildPortsToEndpointsMap builds a map of portname -> all ip:ports for that portname. Explode Endpoints.Subsets[*] into this structure.
func EnsureSysctl ¶
func EnsureSysctl(sysctl utilsysctl.Interface, name string, newVal int) error
EnsureSysctl sets a kernel sysctl to a given numeric value.
func FilterIncorrectCIDRVersion ¶
FilterIncorrectCIDRVersion filters out the incorrect IP version case from a slice of CIDR strings.
func FilterIncorrectIPVersion ¶
FilterIncorrectIPVersion filters out the incorrect IP version case from a slice of IP strings.
func GetLocalAddrs ¶
GetLocalAddrs returns a list of all network addresses on the local system
func GetNodeAddresses ¶
func GetNodeAddresses(cidrs []string, nw NetworkInterfacer) (sets.String, error)
GetNodeAddresses return all matched node IP addresses based on given cidr slice. Some callers, e.g. IPVS proxier, need concrete IPs, not ranges, which is why this exists. NetworkInterfacer is injected for test purpose. We expect the cidrs passed in is already validated. Given an empty input `[]`, it will return `0.0.0.0/0` and `::/0` directly. If multiple cidrs is given, it will return the minimal IP sets, e.g. given input `[1.2.0.0/16, 0.0.0.0/0]`, it will only return `0.0.0.0/0`. NOTE: GetNodeAddresses only accepts CIDRs, if you want concrete IPs, e.g. 1.2.3.4, then the input should be 1.2.3.4/32.
func IPPart ¶
IPPart returns just the IP part of an IP or IP:port or endpoint string. If the IP part is an IPv6 address enclosed in brackets (e.g. "[fd00:1::5]:9999"), then the brackets are stripped as well.
func IsProxyableHostname ¶
IsProxyableHostname checks if the IP addresses for a given hostname are permitted to be proxied
func IsProxyableIP ¶
IsProxyableIP checks if a given IP address is permitted to be proxied
func IsZeroCIDR ¶
IsZeroCIDR checks whether the input CIDR string is either the IPv4 or IPv6 zero CIDR
func LogAndEmitIncorrectIPVersionEvent ¶
func LogAndEmitIncorrectIPVersionEvent(recorder record.EventRecorder, fieldName, fieldValue, svcNamespace, svcName string, svcUID types.UID)
LogAndEmitIncorrectIPVersionEvent logs and emits incorrect IP version event.
func RevertPorts ¶
RevertPorts is closing ports in replacementPortsMap but not in originalPortsMap. In other words, it only closes the ports opened in this sync.
func ShouldSkipService ¶
ShouldSkipService checks if a given service should skip proxying
func ShuffleStrings ¶
ShuffleStrings copies strings from the specified slice into a copy in random order. It returns a new slice.
Types ¶
type Closeable ¶
type Closeable interface {
Close() error
}
Closeable is an interface around closing a port.
type LocalPort ¶
type LocalPort struct {
// Description is the identity message of a given local port.
Description string
// IP is the IP address part of a given local port.
// If this string is empty, the port binds to all local IP addresses.
IP string
// Port is the port part of a given local port.
Port int
// Protocol is the protocol part of a given local port.
// The value is assumed to be lower-case. For example, "udp" not "UDP", "tcp" not "TCP".
Protocol string
}
LocalPort describes a port on specific IP address and protocol
type NetworkInterfacer ¶
type NetworkInterfacer interface {
Addrs(intf *net.Interface) ([]net.Addr, error)
Interfaces() ([]net.Interface, error)
}
NetworkInterfacer defines an interface for several net library functions. Production code will forward to net library functions, and unit tests will override the methods for testing purposes.
type PortOpener ¶
PortOpener is an interface around port opening/closing. Abstracted out for testing.
type RealNetwork ¶
type RealNetwork struct{}
RealNetwork implements the NetworkInterfacer interface for production code, just wrapping the underlying net library function calls.
func (RealNetwork) Addrs ¶
Addrs wraps net.Interface.Addrs(), it's a part of NetworkInterfacer interface.
func (RealNetwork) Interfaces ¶
func (RealNetwork) Interfaces() ([]net.Interface, error)
Interfaces wraps net.Interfaces(), it's a part of NetworkInterfacer interface.
Source Files