policy

package
v1.8.2 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jul 23, 2020 License: Apache-2.0 Imports: 35 Imported by: 131

Documentation

Index

Constants

View Source 
const (
	LabelKeyPolicyDerivedFrom  = "io.cilium.policy.derived-from"
	LabelAllowLocalHostIngress = "allow-localhost-ingress"
	LabelAllowAnyIngress       = "allow-any-ingress"
	LabelAllowAnyEgress        = "allow-any-egress"
	LabelVisibilityAnnotation  = "visibility-annotation"
)

Variables

This section is empty.

Functions

func GetCIDRPrefixes added in v0.15.7 

func GetCIDRPrefixes(rules api.Rules) []*net.IPNet

GetCIDRPrefixes runs through the specified 'rules' to find every reference to a CIDR in the rules, and returns a slice containing all of these CIDRs. Multiple rules referring to the same CIDR will result in multiple copies of the CIDR in the returned slice.

Assumes that validation already occurred on 'rules'.

func GetDefaultPrefixLengths added in v1.5.0 

func GetDefaultPrefixLengths() (s6 []int, s4 []int)

GetDefaultPrefixLengths returns the set of prefix lengths for handling CIDRs that are unconditionally mapped to identities, ie for the reserved identities 'host', 'world'.

func GetPolicyEnabled added in v0.15.7 

func GetPolicyEnabled() string

GetPolicyEnabled returns the policy enablement configuration

func GetPrefixesFromCIDRSet added in v0.15.7 

func GetPrefixesFromCIDRSet(rules api.CIDRRuleSlice) []*net.IPNet

GetPrefixesFromCIDRSet fetches all CIDRs referred to by the specified slice and returns them as regular golang CIDR objects.

Assumes that validation already occurred on 'rules'.

func JSONMarshalRules added in v0.9.0 

func JSONMarshalRules(rules api.Rules) string

JSONMarshalRules returns a slice of policy rules as string in JSON representation

func JoinPath 

func JoinPath(a, b string) string

JoinPath returns a joined path from a and b.

func ParseProxyID added in v0.15.7 

func ParseProxyID(proxyID string) (endpointID uint16, ingress bool, protocol string, port uint16, err error)

ParseProxyID parses a proxy ID returned by ProxyID and returns its components.

func ProxyID added in v0.15.7 

func ProxyID(endpointID uint16, ingress bool, protocol string, port uint16) string

ProxyID returns a unique string to identify a proxy mapping.

func ProxyIDFromFilter added in v1.6.0 

func ProxyIDFromFilter(endpointID uint16, npMap NamedPortsMap, l4 *L4Filter) (id string, err error)

ProxyIDFromFilter returns a unique string to identify a proxy mapping.

func ProxyIDFromKey added in v0.15.7 

func ProxyIDFromKey(endpointID uint16, key Key) string

ProxyIDFromKey returns a unique string to identify a proxy mapping.

func SetPolicyEnabled added in v0.15.7 

func SetPolicyEnabled(val string)

SetPolicyEnabled sets the policy enablement configuration. Valid values are: - endpoint.AlwaysEnforce - endpoint.NeverEnforce - endpoint.DefaultEnforcement

func ValidatePortName added in v1.8.0 

func ValidatePortName(name string) (string, error)

Types

type AddOptions added in v0.15.7 

type AddOptions struct {
	// Replace if true indicates that existing rules with identical labels should be replaced
	Replace bool
	// ReplaceWithLabels if present indicates that existing rules with the
	// given LabelArray should be deleted.
	ReplaceWithLabels labels.LabelArray
	// Generated should be set as true to signalize a the policy being inserted
	// was generated by cilium-agent, e.g. dns poller.
	Generated bool

	// The source of this policy, one of api, fqdn or k8s
	Source string
}

AddOptions are options which can be passed to PolicyAdd

type CIDRPolicy added in v1.5.0 

type CIDRPolicy struct {
	Ingress CIDRPolicyMap
	Egress  CIDRPolicyMap
}

CIDRPolicy contains L3 (CIDR) policy maps for ingress.

This is not used for map entry generation; It has two uses:

  • On older kernels, generate the set of CIDR prefix lengths that are necessary to implement an LPM
  • Reflect desired state of the CIDR policy in the API.

func NewCIDRPolicy added in v1.5.0 

func NewCIDRPolicy() (policy *CIDRPolicy)

NewCIDRPolicy creates a new CIDRPolicy.

func (*CIDRPolicy) GetModel added in v1.5.0 

func (cp *CIDRPolicy) GetModel() *models.CIDRPolicy

GetModel returns the API model representation of the CIDRPolicy.

func (*CIDRPolicy) ToBPFData added in v1.5.0 

func (cp *CIDRPolicy) ToBPFData() (s6, s4 []int)

ToBPFData converts the ingress and egress cidr map into int slices 's6' (IPv6) and 's4' (IPv4), formatted for insertion into bpf program as prefix lengths.

Note that this will always include the CIDR prefix lengths for host (eg /32 for host), cluster (typically /8 or /64), and world (/0).

FIXME: Move this function out of policy into a datapath specific package

func (*CIDRPolicy) Validate added in v1.5.0 

func (cp *CIDRPolicy) Validate() error

Validate returns error if the CIDR policy might lead to code generation failure

type CIDRPolicyMap added in v1.5.0 

type CIDRPolicyMap struct {
	Map map[string]*CIDRPolicyMapRule // Allowed L3 (CIDR) prefixes

	IPv6PrefixCount map[int]int // Count of IPv6 prefixes in 'Map' indexed by prefix length
	IPv4PrefixCount map[int]int // Count of IPv4 prefixes in 'Map' indexed by prefix length
}

CIDRPolicyMap is a list of CIDR filters indexable by address/prefixlen key format: "address/prefixlen", e.g., "10.1.1.0/24" Each prefix struct also includes the rule labels that allowed it.

CIDRPolicyMap does no locking internally, so the user is responsible for synchronizing between multiple threads when applicable.

func (*CIDRPolicyMap) Insert added in v1.5.0 

func (m *CIDRPolicyMap) Insert(cidr string, ruleLabels labels.LabelArray) int

Insert places 'cidr' and its corresponding rule labels into map 'm'. Returns `1` if `cidr` is added to the map, `0` otherwise.

type CIDRPolicyMapRule added in v1.5.0 

type CIDRPolicyMapRule struct {
	Prefix           net.IPNet
	DerivedFromRules labels.LabelArrayList
}

CIDRPolicyMapRule holds a L3 (CIDR) prefix and the rule labels that allow it.

type CachedSelectionUser added in v0.15.7 

type CachedSelectionUser interface {
	// IdentitySelectionUpdated implementations MUST NOT call back
	// to the name manager or the selector cache while executing this function!
	//
	// The caller is responsible for making sure the same identity is not
	// present in both 'added' and 'deleted'.
	IdentitySelectionUpdated(selector CachedSelector, selections, added, deleted []identity.NumericIdentity)
}

CachedSelectionUser inserts selectors into the cache and gets update callbacks whenever the set of selected numeric identities change for the CachedSelectors pushed by it.

type CachedSelector added in v0.15.7 

type CachedSelector interface {
	// GetSelections returns the cached set of numeric identities
	// selected by the CachedSelector.  The retuned slice must NOT
	// be modified, as it is shared among multiple users.
	GetSelections() []identity.NumericIdentity

	// Selects return 'true' if the CachedSelector selects the given
	// numeric identity.
	Selects(nid identity.NumericIdentity) bool

	// IsWildcard returns true if the endpoint selector selects
	// all endpoints.
	IsWildcard() bool

	// IsNone returns true if the selector never selects anything
	IsNone() bool

	// String returns the string representation of this selector.
	// Used as a map key.
	String() string
}

CachedSelector represents an identity selector owned by the selector cache

type CachedSelectorSlice added in v0.15.7 

type CachedSelectorSlice []CachedSelector

CachedSelectorSlice is a slice of CachedSelectors that can be sorted.

func (CachedSelectorSlice) Len added in v0.15.7 

func (s CachedSelectorSlice) Len() int

func (CachedSelectorSlice) Less added in v0.15.7 

func (s CachedSelectorSlice) Less(i, j int) bool

func (CachedSelectorSlice) MarshalJSON added in v0.15.7 

func (s CachedSelectorSlice) MarshalJSON() ([]byte, error)

MarshalJSON returns the CachedSelectors as JSON formatted buffer

func (CachedSelectorSlice) SelectsAllEndpoints added in v0.15.7 

func (s CachedSelectorSlice) SelectsAllEndpoints() bool

SelectsAllEndpoints returns whether the CachedSelectorSlice selects all endpoints, which is true if the wildcard endpoint selector is present in the slice.

func (CachedSelectorSlice) Swap added in v0.15.7 

func (s CachedSelectorSlice) Swap(i, j int)

type CertificateManager added in v1.7.0 

type CertificateManager interface {
	GetTLSContext(ctx context.Context, tls *api.TLSContext, defaultNs string) (ca, public, private string, err error)
	GetSecretString(ctx context.Context, secret *api.Secret, defaultNs string) (string, error)
}

type DirectionalVisibilityPolicy added in v0.15.7 

type DirectionalVisibilityPolicy map[string]*VisibilityMetadata

DirectionalVisibilityPolicy is a mapping of VisibilityMetadata keyed by L4 Port / L4 Protocol (e.g., 80/TCP) for a given traffic direction (e.g., ingress or egress). This encodes at which L4 Port / L4 Protocol traffic should be redirected to a given L7 proxy. An empty instance of this type indicates that no traffic should be redirected.

type Endpoint added in v0.15.7 

type Endpoint interface {
	GetID16() uint16
	GetSecurityIdentity() (*identity.Identity, error)
	PolicyRevisionBumpEvent(rev uint64)
	IsHost() bool
}

Endpoint refers to any structure which has the following properties: * a node-local ID stored as a uint16 * a security identity * a means of incrementing its policy revision * a means of checking if it represents a node or a pod.

type EndpointPolicy added in v0.15.7 

type EndpointPolicy struct {

	// NamedPortsMap maps PortNames in L4Filters to port numbers. This mapping
	// is endpoint specific. Can be nil!
	NamedPortsMap NamedPortsMap

	// PolicyMapState contains the state of this policy as it relates to the
	// datapath. In the future, this will be factored out of this object to
	// decouple the policy as it relates to the datapath vs. its userspace
	// representation.
	// It maps each Key to the proxy port if proxy redirection is needed.
	// Proxy port 0 indicates no proxy redirection.
	// All fields within the Key and the proxy port must be in host byte-order.
	PolicyMapState MapState

	// PolicyOwner describes any type which consumes this EndpointPolicy object.
	PolicyOwner PolicyOwner
	// contains filtered or unexported fields
}

EndpointPolicy is a structure which contains the resolved policy across all layers (L3, L4, and L7), distilled against a set of identities.

func NewEndpointPolicy added in v0.15.7 

func NewEndpointPolicy(repo *Repository) *EndpointPolicy

NewEndpointPolicy returns an empty EndpointPolicy stub.

func (EndpointPolicy) Attach added in v0.15.7 

func (p EndpointPolicy) Attach(ctx PolicyContext)

func (*EndpointPolicy) ConsumeMapChanges added in v0.15.7 

func (p *EndpointPolicy) ConsumeMapChanges() (adds, deletes MapState)

ConsumeMapChanges transfers the changes from MapChanges to the caller, locking the selector cache to make sure concurrent identity updates have completed.

func (EndpointPolicy) Detach added in v0.15.7 

func (p EndpointPolicy) Detach()

Detach releases resources held by a selectorPolicy to enable successful eventual GC. Note that the selectorPolicy itself if not modified in any way, so that it can be used concurrently.

func (EndpointPolicy) DistillPolicy added in v0.15.7 

func (p EndpointPolicy) DistillPolicy(policyOwner PolicyOwner, npMap NamedPortsMap, isHost bool) *EndpointPolicy

DistillPolicy filters down the specified selectorPolicy (which acts upon selectors) into a set of concrete map entries based on the SelectorCache. These can subsequently be plumbed into the datapath.

Must be performed while holding the Repository lock. PolicyOwner (aka Endpoint) is also locked during this call.

type EndpointSet added in v0.15.7 

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

EndpointSet is used to be able to group together a given set of Endpoints that need to have a specific operation performed upon them (e.g., policy revision updates).

func NewEndpointSet added in v0.15.7 

func NewEndpointSet(m map[Endpoint]struct{}) *EndpointSet

NewEndpointSet returns an EndpointSet with the given Endpoints map

func (*EndpointSet) Delete added in v0.15.7 

func (e *EndpointSet) Delete(ep Endpoint)

Delete removes ep from the EndpointSet.

func (*EndpointSet) ForEachGo added in v0.15.7 

func (e *EndpointSet) ForEachGo(wg *sync.WaitGroup, epFunc func(epp Endpoint))

ForEachGo runs epFunc asynchronously inside a go routine for each endpoint in the EndpointSet. It signals to the provided WaitGroup when epFunc has been executed for each endpoint.

func (*EndpointSet) Insert added in v0.15.7 

func (e *EndpointSet) Insert(ep Endpoint)

Insert adds ep to the EndpointSet.

func (*EndpointSet) Len added in v0.15.7 

func (e *EndpointSet) Len() (nElem int)

Len returns the number of elements in the EndpointSet.

type Key added in v0.15.7 

type Key struct {
	// Identity is the numeric identity to / from which traffic is allowed.
	Identity uint32
	// DestPort is the port at L4 to / from which traffic is allowed, in
	// host-byte order.
	DestPort uint16
	// NextHdr is the protocol which is allowed.
	Nexthdr uint8
	// TrafficDirection indicates in which direction Identity is allowed
	// communication (egress or ingress).
	TrafficDirection uint8
}

Key is the userspace representation of a policy key in BPF. It is intentionally duplicated from pkg/maps/policymap to avoid pulling in the BPF dependency to this package.

func (Key) IsEgress added in v0.15.7 

func (k Key) IsEgress() bool

IsEgress returns true if the key refers to an egress policy key

func (Key) IsIngress added in v0.15.7 

func (k Key) IsIngress() bool

IsIngress returns true if the key refers to an ingress policy key

type L4Filter 

type L4Filter struct {
	// Port is the destination port to allow. Port 0 indicates that all traffic
	// is allowed at L4.
	Port     int    `json:"port"`
	PortName string `json:"port-name,omitempty"`
	// Protocol is the L4 protocol to allow or NONE
	Protocol api.L4Proto `json:"protocol"`
	// U8Proto is the Protocol in numeric format, or 0 for NONE
	U8Proto u8proto.U8proto `json:"-"`

	// L7RulesPerSelector is a list of L7 rules per endpoint passed to the L7 proxy.
	// nil values represent cached selectors that have no L7 restriction.
	// Holds references to the cached selectors, which must be released!
	L7RulesPerSelector L7DataMap `json:"l7-rules,omitempty"`
	// L7Parser specifies the L7 protocol parser (optional). If specified as
	// an empty string, then means that no L7 proxy redirect is performed.
	L7Parser L7ParserType `json:"-"`
	// Ingress is true if filter applies at ingress; false if it applies at egress.
	Ingress bool `json:"-"`
	// The rule labels of this Filter
	DerivedFromRules labels.LabelArrayList `json:"-"`
	// contains filtered or unexported fields
}

L4Filter represents the policy (allowed remote sources / destinations of traffic) that applies at a specific L4 port/protocol combination (including all ports and protocols), at either ingress or egress. The policy here is specified in terms of selectors that are mapped to security identities via the selector cache.

func (*L4Filter) CopyL7RulesPerEndpoint added in v0.15.7 

func (l4 *L4Filter) CopyL7RulesPerEndpoint() L7DataMap

CopyL7RulesPerEndpoint returns a shallow copy of the L7RulesPerSelector of the L4Filter.

func (*L4Filter) GetIngress added in v0.15.7 

func (l4 *L4Filter) GetIngress() bool

GetIngress returns whether the L4Filter applies at ingress or egress.

func (*L4Filter) GetL7Parser added in v0.15.7 

func (l4 *L4Filter) GetL7Parser() L7ParserType

GetL7Parser returns the L7ParserType of the L4Filter.

func (*L4Filter) GetPort added in v0.15.7 

func (l4 *L4Filter) GetPort() uint16

GetPort returns the port at which the L4Filter applies as a uint16.

func (*L4Filter) IdentitySelectionUpdated added in v0.15.7 

func (l4 *L4Filter) IdentitySelectionUpdated(selector CachedSelector, selections, added, deleted []identity.NumericIdentity)

IdentitySelectionUpdated implements CachedSelectionUser interface This call is made while holding name manager and selector cache locks, must beware of deadlocking!

The caller is responsible for making sure the same identity is not present in both 'added' and 'deleted'.

func (*L4Filter) IsEnvoyRedirect added in v1.6.4 

func (l4 *L4Filter) IsEnvoyRedirect() bool

IsEnvoyRedirect returns true if the L4 filter contains a port redirected to Envoy

func (*L4Filter) IsProxylibRedirect added in v1.6.4 

func (l4 *L4Filter) IsProxylibRedirect() bool

IsProxylibRedirect returns true if the L4 filter contains a port redirected to Proxylib (via Envoy)

func (*L4Filter) IsRedirect 

func (l4 *L4Filter) IsRedirect() bool

IsRedirect returns true if the L4 filter contains a port redirection

func (*L4Filter) MarshalIndent added in v0.9.0 

func (l4 *L4Filter) MarshalIndent() string

MarshalIndent returns the `L4Filter` in indented JSON string.

func (*L4Filter) SelectsAllEndpoints added in v0.15.7 

func (l4 *L4Filter) SelectsAllEndpoints() bool

SelectsAllEndpoints returns whether the L4Filter selects all endpoints, which is true if the wildcard endpoint selector is present in the map.

func (*L4Filter) String 

func (l4 *L4Filter) String() string

String returns the `L4Filter` in a human-readable string.

func (*L4Filter) ToMapState added in v1.7.0 

func (l4 *L4Filter) ToMapState(npMap NamedPortsMap, direction trafficdirection.TrafficDirection) MapState

ToMapState converts filter into a MapState with two possible values:

  • Entry with ProxyPort = 0: No proxy redirection is needed for this key
  • Entry with any other port #: Proxy redirection is required for this key, caller must replace the ProxyPort with the actual listening port number.

Note: It is possible for two selectors to select the same security ID. To give priority for L7 redirection (e.g., for visibility purposes), we use RedirectPreferredInsert() instead of directly inserting the value to the map.

type L4Policy 

type L4Policy struct {
	Ingress L4PolicyMap
	Egress  L4PolicyMap

	// Revision is the repository revision used to generate this policy.
	Revision uint64
	// contains filtered or unexported fields
}

func NewL4Policy 

func NewL4Policy(revision uint64) *L4Policy

NewL4Policy creates a new L4Policy

func (*L4Policy) AccumulateMapChanges added in v0.15.7 

func (l4 *L4Policy) AccumulateMapChanges(adds, deletes []identity.NumericIdentity, l4Filter *L4Filter,
	direction trafficdirection.TrafficDirection, redirect bool)

AccumulateMapChanges distributes the given changes to the registered users.

The caller is responsible for making sure the same identity is not present in both 'adds' and 'deletes'.

func (*L4Policy) Attach added in v0.15.7 

func (l4 *L4Policy) Attach(ctx PolicyContext)

Attach makes all the L4Filters to point back to the L4Policy that contains them. This is done before the L4Policy is exposed to concurrent access.

func (*L4Policy) Detach added in v0.15.7 

func (l4 *L4Policy) Detach(selectorCache *SelectorCache)

Detach makes the L4Policy ready for garbage collection, removing circular pointer references. Note that the L4Policy itself is not modified in any way, so that it may still be used concurrently.

func (*L4Policy) GetModel 

func (l4 *L4Policy) GetModel() *models.L4Policy

func (*L4Policy) HasEnvoyRedirect added in v0.15.7 

func (l4 *L4Policy) HasEnvoyRedirect() bool

HasEnvoyRedirect returns true if the L4 policy contains at least one port redirection to Envoy

func (*L4Policy) HasProxylibRedirect added in v0.15.7 

func (l4 *L4Policy) HasProxylibRedirect() bool

HasProxylibRedirect returns true if the L4 policy contains at least one port redirection to Proxylib

func (*L4Policy) HasRedirect 

func (l4 *L4Policy) HasRedirect() bool

HasRedirect returns true if the L4 policy contains at least one port redirection

func (*L4Policy) RequiresConntrack 

func (l4 *L4Policy) RequiresConntrack() bool

RequiresConntrack returns true if if the L4 configuration requires connection tracking to be enabled.

type L4PolicyMap 

type L4PolicyMap map[string]*L4Filter

L4PolicyMap is a list of L4 filters indexable by protocol/port key format: "port/proto"

func (L4PolicyMap) Attach added in v1.6.0 

func (l4 L4PolicyMap) Attach(ctx PolicyContext, l4Policy *L4Policy)

Attach makes all the L4Filters to point back to the L4Policy that contains them.

func (L4PolicyMap) Detach added in v0.15.7 

func (l4 L4PolicyMap) Detach(selectorCache *SelectorCache)

Detach removes the cached selectors held by L4PolicyMap from the selectorCache, allowing the map to be garbage collected when there are no more references to it.

func (*L4PolicyMap) EgressCoversContext added in v0.15.7 

func (l4 *L4PolicyMap) EgressCoversContext(ctx *SearchContext) api.Decision

EgressCoversContext checks if the receiver's egress L4Policy contains all `dPorts` and `labels`.

Note: Only used for policy tracing

func (L4PolicyMap) HasEnvoyRedirect added in v1.6.4 

func (l4 L4PolicyMap) HasEnvoyRedirect() bool

HasEnvoyRedirect returns true if at least one L4 filter contains a port redirection that is forwarded to Envoy

func (L4PolicyMap) HasProxylibRedirect added in v1.6.4 

func (l4 L4PolicyMap) HasProxylibRedirect() bool

HasProxylibRedirect returns true if at least one L4 filter contains a port redirection that is forwarded to Proxylib (via Envoy)

func (L4PolicyMap) HasRedirect 

func (l4 L4PolicyMap) HasRedirect() bool

HasRedirect returns true if at least one L4 filter contains a port redirection

func (*L4PolicyMap) IngressCoversContext added in v0.15.7 

func (l4 *L4PolicyMap) IngressCoversContext(ctx *SearchContext) api.Decision

IngressCoversContext checks if the receiver's ingress L4Policy contains all `dPorts` and `labels`.

Note: Only used for policy tracing

type L7DataMap added in v0.15.7 

type L7DataMap map[CachedSelector]*PerSelectorPolicy

L7DataMap contains a map of L7 rules per endpoint where key is a CachedSelector

func (L7DataMap) GetRelevantRulesForKafka added in v1.6.0 

func (l7 L7DataMap) GetRelevantRulesForKafka(nid identity.NumericIdentity) []api.PortRuleKafka

GetRelevantRulesForKafka returns the relevant rules based on the remote numeric identity.

func (L7DataMap) MarshalJSON added in v0.15.7 

func (l7 L7DataMap) MarshalJSON() ([]byte, error)

func (L7DataMap) ShallowCopy added in v0.15.7 

func (l7 L7DataMap) ShallowCopy() L7DataMap

ShallowCopy returns a shallow copy of the L7DataMap.

type L7ParserType added in v0.15.7 

type L7ParserType string

L7ParserType is the type used to indicate what L7 parser to use. Consts are defined for all well known L7 parsers. Unknown string values are created for key-value pair policies, which are then transparently used in redirect configuration. 

const (
	// ParserTypeNone represents the case where no parser type is provided.
	ParserTypeNone L7ParserType = ""
	// ParserTypeHTTP specifies a HTTP parser type
	ParserTypeHTTP L7ParserType = "http"
	// ParserTypeKafka specifies a Kafka parser type
	ParserTypeKafka L7ParserType = "kafka"
	// ParserTypeDNS specifies a DNS parser type
	ParserTypeDNS L7ParserType = "dns"
)

func (L7ParserType) String added in v0.15.7 

func (l7 L7ParserType) String() string

type MapChanges added in v0.15.7 

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

MapChanges collects updates to the endpoint policy on the granularity of individual mapstate key-value pairs for both adds and deletes. 'mutex' must be held for any access.

func (*MapChanges) AccumulateMapChanges added in v0.15.7 

func (mc *MapChanges) AccumulateMapChanges(adds, deletes []identity.NumericIdentity,
	port uint16, proto uint8, direction trafficdirection.TrafficDirection,
	redirect bool, derivedFrom labels.LabelArrayList)

AccumulateMapChanges accumulates the given changes to the MapChanges, updating both maps for each add and delete, as applicable.

The caller is responsible for making sure the same identity is not present in both 'adds' and 'deletes'. Accross multiple calls we maintain the adds and deletes within the MapChanges are disjoint in cases where an identity is first added and then deleted, or first deleted and then added.

type MapState added in v0.15.7 

type MapState map[Key]MapStateEntry

MapState is a state of a policy map.

func (MapState) AllowAllIdentities added in v0.15.7 

func (keys MapState) AllowAllIdentities(ingress, egress bool)

AllowAllIdentities translates all identities in selectorCache to their corresponding Keys in the specified direction (ingress, egress) which allows all at L3.

func (MapState) DetermineAllowLocalhostIngress added in v0.15.7 

func (keys MapState) DetermineAllowLocalhostIngress(l4Policy *L4Policy)

DetermineAllowLocalhostIngress determines whether communication should be allowed from the localhost. It inserts the Key corresponding to the localhost in the desiredPolicyKeys if the localhost is allowed to communicate with the endpoint.

func (MapState) RedirectPreferredInsert added in v1.7.0 

func (keys MapState) RedirectPreferredInsert(key Key, entry MapStateEntry)

RedirectPreferredInsert inserts a new entry giving priority to L7-redirects by not overwriting a L7-redirect entry with a non-redirect entry

type MapStateEntry added in v0.15.7 

type MapStateEntry struct {
	// The proxy port, in host byte order.
	// If 0 (default), there is no proxy redirection for the corresponding
	// Key. Any other value signifies proxy redirection.
	ProxyPort uint16

	// DerivedFromRules tracks the policy rules this entry derives from
	DerivedFromRules labels.LabelArrayList
}

MapStateEntry is the configuration associated with a Key in a MapState. This is a minimized version of policymap.PolicyEntry.

func NewMapStateEntry added in v0.15.7 

func NewMapStateEntry(derivedFrom labels.LabelArrayList, redirect bool) MapStateEntry

NewMapStateEntry creates a map state entry. If redirect is true, the caller is expected to replace the ProxyPort field before it is added to the actual BPF map.

func (*MapStateEntry) Equal added in v1.7.13 

func (e *MapStateEntry) Equal(o *MapStateEntry) bool

Equal returns true of two entries are equal

func (*MapStateEntry) IsRedirectEntry added in v0.15.7 

func (e *MapStateEntry) IsRedirectEntry() bool

IsRedirectEntry returns true if e contains a redirect

type NamedPort added in v1.8.0 

type NamedPort struct {
	Port  uint16 // non-0
	Proto uint8  // 0 for any
}

NamedPort represents a mapping from a port name to the port number and protocol

func ParsePortProtocol added in v1.8.0 

func ParsePortProtocol(port int, protocol string) (np NamedPort, err error)

type NamedPortsMap added in v1.8.0 

type NamedPortsMap map[string]NamedPort

func (NamedPortsMap) AddPort added in v1.8.0 

func (npm NamedPortsMap) AddPort(name string, port int, protocol string) error

func (NamedPortsMap) GetNamedPort added in v1.8.0 

func (npm NamedPortsMap) GetNamedPort(name string, proto uint8) (port uint16, err error)

type PerSelectorPolicy added in v0.15.7 

type PerSelectorPolicy struct {
	// TerminatingTLS is the TLS context for the connection terminated by
	// the L7 proxy.  For egress policy this specifies the server-side TLS
	// parameters to be applied on the connections originated from the local
	// POD and terminated by the L7 proxy. For ingress policy this specifies
	// the server-side TLS parameters to be applied on the connections
	// originated from a remote source and terminated by the L7 proxy.
	TerminatingTLS *TLSContext `json:"terminatingTLS,omitempty"`

	// OriginatingTLS is the TLS context for the connections originated by
	// the L7 proxy.  For egress policy this specifies the client-side TLS
	// parameters for the upstream connection originating from the L7 proxy
	// to the remote destination. For ingress policy this specifies the
	// client-side TLS parameters for the connection from the L7 proxy to
	// the local POD.
	OriginatingTLS *TLSContext `json:"originatingTLS,omitempty"`

	// Pre-computed HTTP rules with resolved k8s secrets
	// Computed after rule merging is complete!
	EnvoyHTTPRules *cilium.HttpNetworkPolicyRules `json:"-"`

	// CanShortCircuit is true if all 'EnvoyHTTPRules' may be
	// short-circuited by other matches.
	CanShortCircuit bool `json:"-"`

	api.L7Rules
}

func (*PerSelectorPolicy) Equal added in v0.15.7 

func (a *PerSelectorPolicy) Equal(b *PerSelectorPolicy) bool

Equal returns true if 'a' and 'b' represent the same L7 Rules

type PolicyCache added in v0.15.7 

type PolicyCache struct {
	lock.Mutex
	// contains filtered or unexported fields
}

PolicyCache represents a cache of resolved policies for identities.

func NewPolicyCache added in v0.15.7 

func NewPolicyCache(repo *Repository, subscribe bool) *PolicyCache

NewPolicyCache creates a new cache of SelectorPolicy.

func (*PolicyCache) GetSelectorCache added in v0.15.7 

func (cache *PolicyCache) GetSelectorCache() *SelectorCache

func (*PolicyCache) LocalEndpointIdentityAdded added in v0.15.7 

func (cache *PolicyCache) LocalEndpointIdentityAdded(identity *identityPkg.Identity)

LocalEndpointIdentityAdded creates a SelectorPolicy cache entry for the specified Identity, without calculating any policy for it.

func (*PolicyCache) LocalEndpointIdentityRemoved added in v0.15.7 

func (cache *PolicyCache) LocalEndpointIdentityRemoved(identity *identityPkg.Identity)

LocalEndpointIdentityRemoved deletes the cached SelectorPolicy for the specified Identity.

func (*PolicyCache) Lookup added in v0.15.7 

func (cache *PolicyCache) Lookup(identity *identityPkg.Identity) SelectorPolicy

Lookup attempts to locate the SelectorPolicy corresponding to the specified identity. If policy is not cached for the identity, it returns nil.

func (*PolicyCache) UpdatePolicy added in v0.15.7 

func (cache *PolicyCache) UpdatePolicy(identity *identityPkg.Identity) error

UpdatePolicy resolves the policy for the security identity of the specified endpoint and caches it for future use.

The caller must provide threadsafety for iteration over the policy repository.

type PolicyContext added in v0.15.7 

type PolicyContext interface {
	// return the SelectorCache
	GetSelectorCache() *SelectorCache

	// GetTLSContext resolves the given 'api.TLSContext' into CA
	// certs and the public and private keys, using secrets from
	// k8s or from the local file system.
	GetTLSContext(tls *api.TLSContext) (ca, public, private string, err error)

	// GetEnvoyHTTPRules translates the given 'api.L7Rules' into
	// the protobuf representation the Envoy can consume. The bool
	// return parameter tells whether the the rule enforcement can
	// be short-circuited upon the first allowing rule. This is
	// false if any of the rules has side-effects, requiring all
	// such rules being evaluated.
	GetEnvoyHTTPRules(l7Rules *api.L7Rules) (*cilium.HttpNetworkPolicyRules, bool)
}

PolicyContext is an interface policy resolution functions use to access the Repository. This way testing code can run without mocking a full Repository.

type PolicyOwner added in v0.15.7 

type PolicyOwner interface {
	GetID() uint64
	LookupRedirectPortLocked(npMap NamedPortsMap, l4 *L4Filter) uint16
}

PolicyOwner is anything which consumes a EndpointPolicy.

type ProxyPolicy added in v0.15.7 

type ProxyPolicy interface {
	CopyL7RulesPerEndpoint() L7DataMap
	GetL7Parser() L7ParserType
	GetIngress() bool
	GetPort() uint16
}

ProxyPolicy is any type which encodes state needed to redirect to an L7 proxy.

type Repository added in v0.9.0 

type Repository struct {
	// Mutex protects the whole policy tree
	Mutex lock.RWMutex

	// RepositoryChangeQueue is a queue which serializes changes to the policy
	// repository.
	RepositoryChangeQueue *eventqueue.EventQueue

	// RuleReactionQueue is a queue which serializes the resultant events that
	// need to occur after updating the state of the policy repository. This
	// can include queueing endpoint regenerations, policy revision increments
	// for endpoints, etc.
	RuleReactionQueue *eventqueue.EventQueue
	// contains filtered or unexported fields
}

Repository is a list of policy rules which in combination form the security policy. A policy repository can be

func NewPolicyRepository added in v0.9.0 

func NewPolicyRepository(idCache cache.IdentityCache, certManager CertificateManager) *Repository

NewPolicyRepository creates a new policy repository.

func (*Repository) Add added in v0.9.0 

func (p *Repository) Add(r api.Rule, localRuleConsumers []Endpoint) (uint64, map[uint16]struct{}, error)

Add inserts a rule into the policy repository This is just a helper function for unit testing. TODO: this should be in a test_helpers.go file or something similar so we can clearly delineate what helpers are for testing. NOTE: This is only called from unit tests, but from multiple packages.

func (*Repository) AddList added in v0.9.0 

func (p *Repository) AddList(rules api.Rules) (ruleSlice, uint64)

AddList inserts a rule into the policy repository. It is used for unit-testing purposes only.

func (*Repository) AddListLocked added in v0.9.0 

func (p *Repository) AddListLocked(rules api.Rules) (ruleSlice, uint64)

AddListLocked inserts a rule into the policy repository with the repository already locked Expects that the entire rule list has already been sanitized.

func (*Repository) AllowsEgressRLocked added in v0.15.7 

func (p *Repository) AllowsEgressRLocked(ctx *SearchContext) api.Decision

AllowsEgressRLocked evaluates the policy repository for the provided search context and returns the verdict. If no matching policy allows for the connection, the request will be denied. The policy repository mutex must be held.

NOTE: This is only called from unit tests, but from multiple packages.

func (*Repository) AllowsIngressRLocked added in v0.15.7 

func (p *Repository) AllowsIngressRLocked(ctx *SearchContext) api.Decision

AllowsIngressRLocked evaluates the policy repository for the provided search context and returns the verdict for ingress. If no matching policy allows for the connection, the request will be denied. The policy repository mutex must be held.

func (*Repository) BumpRevision added in v0.15.7 

func (p *Repository) BumpRevision()

BumpRevision allows forcing policy regeneration

func (*Repository) DeleteByLabels added in v0.9.0 

func (p *Repository) DeleteByLabels(lbls labels.LabelArray) (uint64, int)

DeleteByLabels deletes all rules in the policy repository which contain the specified labels

func (*Repository) DeleteByLabelsLocked added in v0.9.0 

func (p *Repository) DeleteByLabelsLocked(lbls labels.LabelArray) (ruleSlice, uint64, int)

DeleteByLabelsLocked deletes all rules in the policy repository which contain the specified labels. Returns the revision of the policy repository after deleting the rules, as well as now many rules were deleted.

func (*Repository) Empty added in v0.15.7 

func (p *Repository) Empty() bool

Empty returns 'true' if repository has no rules, 'false' otherwise.

Must be called without p.Mutex held

func (*Repository) GetEnvoyHTTPRules added in v0.15.7 

func (p *Repository) GetEnvoyHTTPRules(l7Rules *api.L7Rules, ns string) (*cilium.HttpNetworkPolicyRules, bool)

func (*Repository) GetJSON added in v0.9.0 

func (p *Repository) GetJSON() string

GetJSON returns all rules of the policy repository as string in JSON representation

func (*Repository) GetPolicyCache added in v0.15.7 

func (p *Repository) GetPolicyCache() *PolicyCache

GetPolicyCache() returns the policy cache used by the Repository

func (*Repository) GetRevision added in v0.10.0 

func (p *Repository) GetRevision() uint64

GetRevision returns the revision of the policy repository

func (*Repository) GetRulesList added in v0.15.7 

func (p *Repository) GetRulesList() *models.Policy

GetRulesList returns the current policy

func (*Repository) GetRulesMatching added in v0.9.0 

func (p *Repository) GetRulesMatching(lbls labels.LabelArray) (ingressMatch bool, egressMatch bool)

GetRulesMatching returns whether any of the rules in a repository contain a rule with labels matching the labels in the provided LabelArray.

Must be called with p.Mutex held

func (*Repository) GetSelectorCache added in v0.15.7 

func (p *Repository) GetSelectorCache() *SelectorCache

GetSelectorCache() returns the selector cache used by the Repository

func (*Repository) LocalEndpointIdentityAdded added in v0.15.7 

func (p *Repository) LocalEndpointIdentityAdded(*identity.Identity)

LocalEndpointIdentityAdded handles local identity add events.

func (*Repository) LocalEndpointIdentityRemoved added in v0.15.7 

func (p *Repository) LocalEndpointIdentityRemoved(identity *identity.Identity)

LocalEndpointIdentityRemoved handles local identity removal events to remove references from rules in the repository to the specified identity.

func (*Repository) NumRules added in v0.9.0 

func (p *Repository) NumRules() int

NumRules returns the amount of rules in the policy repository.

Must be called with p.Mutex held

func (*Repository) ResolveL4EgressPolicy added in v0.15.7 

func (p *Repository) ResolveL4EgressPolicy(ctx *SearchContext) (L4PolicyMap, error)

ResolveL4EgressPolicy resolves the L4 egress policy for a set of endpoints by searching the policy repository for `PortRule` rules that are attached to a `Rule` where the EndpointSelector matches `ctx.From`. `ctx.To` takes no effect and is ignored in the search. If multiple `PortRule` rules are found, all rules are merged together. If rules contains overlapping port definitions, the first rule found in the repository takes precedence.

Caller must release resources by calling Detach() on the returned map!

NOTE: This is only called from unit tests, but from multiple packages.

func (*Repository) ResolveL4IngressPolicy added in v0.15.7 

func (p *Repository) ResolveL4IngressPolicy(ctx *SearchContext) (L4PolicyMap, error)

ResolveL4IngressPolicy resolves the L4 ingress policy for a set of endpoints by searching the policy repository for `PortRule` rules that are attached to a `Rule` where the EndpointSelector matches `ctx.To`. `ctx.From` takes no effect and is ignored in the search. If multiple `PortRule` rules are found, all rules are merged together. If rules contains overlapping port definitions, the first rule found in the repository takes precedence.

TODO: Coalesce l7 rules?

Caller must release resources by calling Detach() on the returned map!

Note: Only used for policy tracing

func (*Repository) SearchRLocked added in v0.9.0 

func (p *Repository) SearchRLocked(lbls labels.LabelArray) api.Rules

SearchRLocked searches the policy repository for rules which match the specified labels and will return an array of all rules which matched.

func (*Repository) SetEnvoyRulesFunc added in v0.15.7 

func (p *Repository) SetEnvoyRulesFunc(f func(CertificateManager, *api.L7Rules, string) (*cilium.HttpNetworkPolicyRules, bool))

func (*Repository) TranslateRules added in v0.15.7 

func (p *Repository) TranslateRules(translator Translator) (*TranslationResult, error)

TranslateRules traverses rules and applies provided translator to rules

Note: Only used by the k8s watcher.

type SearchContext 

type SearchContext struct {
	Trace   Tracing
	Depth   int
	Logging *stdlog.Logger
	From    labels.LabelArray
	To      labels.LabelArray
	DPorts  []*models.Port
	// contains filtered or unexported fields
}

SearchContext defines the context while evaluating policy

func (*SearchContext) CallDepth 

func (s *SearchContext) CallDepth() string

func (*SearchContext) PolicyTrace added in v0.9.0 

func (s *SearchContext) PolicyTrace(format string, a ...interface{})

PolicyTrace logs the given message into the SearchContext logger only if TRACE_ENABLED or TRACE_VERBOSE is enabled in the receiver's SearchContext.

func (*SearchContext) PolicyTraceVerbose added in v0.9.0 

func (s *SearchContext) PolicyTraceVerbose(format string, a ...interface{})

PolicyTraceVerbose logs the given message into the SearchContext logger only if TRACE_VERBOSE is enabled in the receiver's SearchContext.

func (*SearchContext) String 

func (s *SearchContext) String() string

func (*SearchContext) TraceEnabled added in v0.15.7 

func (s *SearchContext) TraceEnabled() bool

TraceEnabled returns true if the SearchContext requests tracing.

func (*SearchContext) WithLogger added in v0.15.7 

func (s *SearchContext) WithLogger(log io.Writer) *SearchContext

WithLogger returns a shallow copy of the received SearchContext with the logging set to write to 'log'.

type SelectorCache added in v0.15.7 

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

SelectorCache caches identities, identity selectors, and the subsets of identities each selector selects.

func NewSelectorCache added in v0.15.7 

func NewSelectorCache(ids cache.IdentityCache) *SelectorCache

NewSelectorCache creates a new SelectorCache with the given identities.

func (*SelectorCache) AddFQDNSelector added in v0.15.7 

func (sc *SelectorCache) AddFQDNSelector(user CachedSelectionUser, fqdnSelec api.FQDNSelector) (cachedSelector CachedSelector, added bool)

AddFQDNSelector adds the given api.FQDNSelector in to the selector cache. If an identical EndpointSelector has already been cached, the corresponding CachedSelector is returned, otherwise one is created and added to the cache.

func (*SelectorCache) AddIdentitySelector added in v0.15.7 

func (sc *SelectorCache) AddIdentitySelector(user CachedSelectionUser, selector api.EndpointSelector) (cachedSelector CachedSelector, added bool)

AddIdentitySelector adds the given api.EndpointSelector in to the selector cache. If an identical EndpointSelector has already been cached, the corresponding CachedSelector is returned, otherwise one is created and added to the cache.

func (*SelectorCache) ChangeUser added in v0.15.7 

func (sc *SelectorCache) ChangeUser(selector CachedSelector, from, to CachedSelectionUser)

ChangeUser changes the CachedSelectionUser that gets updates on the updates on the cached selector.

func (*SelectorCache) FindCachedIdentitySelector added in v0.15.7 

func (sc *SelectorCache) FindCachedIdentitySelector(selector api.EndpointSelector) CachedSelector

FindCachedIdentitySelector finds the given api.EndpointSelector in the selector cache, returning nil if one can not be found.

func (*SelectorCache) GetModel added in v0.15.7 

func (sc *SelectorCache) GetModel() models.SelectorCache

GetModel returns the API model of the SelectorCache.

func (*SelectorCache) RemoveIdentitiesFQDNSelectors added in v0.15.7 

func (sc *SelectorCache) RemoveIdentitiesFQDNSelectors(fqdnSels []api.FQDNSelector)

RemoveIdentitiesFQDNSelectors removes all identities from being mapped to the set of FQDNSelectors.

func (*SelectorCache) RemoveSelector added in v0.15.7 

func (sc *SelectorCache) RemoveSelector(selector CachedSelector, user CachedSelectionUser)

RemoveSelector removes CachedSelector for the user.

func (*SelectorCache) RemoveSelectors added in v0.15.7 

func (sc *SelectorCache) RemoveSelectors(selectors CachedSelectorSlice, user CachedSelectionUser)

RemoveSelectors removes CachedSelectorSlice for the user.

func (*SelectorCache) SetLocalIdentityNotifier added in v0.15.7 

func (sc *SelectorCache) SetLocalIdentityNotifier(pop identityNotifier)

SetLocalIdentityNotifier injects the provided identityNotifier into the SelectorCache. Currently, this is used to inject the FQDN subsystem into the SelectorCache so the SelectorCache can notify the FQDN subsystem when it should be aware of a given FQDNSelector for which CIDR identities need to be provided upon DNS lookups which corespond to said FQDNSelector.

func (*SelectorCache) UpdateFQDNSelector added in v0.15.7 

func (sc *SelectorCache) UpdateFQDNSelector(fqdnSelec api.FQDNSelector, identities []identity.NumericIdentity)

UpdateFQDNSelector updates the mapping of fqdnKey (the FQDNSelector from a policy rule as a string) to to the provided list of identities. If the contents of the cachedSelections differ from those in the identities slice, all users are notified.

func (*SelectorCache) UpdateIdentities added in v0.15.7 

func (sc *SelectorCache) UpdateIdentities(added, deleted cache.IdentityCache)

UpdateIdentities propagates identity updates to selectors

The caller is responsible for making sure the same identity is not present in both 'added' and 'deleted'.

type SelectorPolicy added in v0.15.7 

type SelectorPolicy interface {
	// Consume returns the policy in terms of connectivity to peer
	// Identities.
	Consume(owner PolicyOwner, npMap NamedPortsMap) *EndpointPolicy
}

SelectorPolicy represents a cached selectorPolicy, previously resolved from the policy repository and ready to be distilled against a set of identities to compute datapath-level policy configuration.

type TLSContext added in v0.15.7 

type TLSContext struct {
	TrustedCA        string `json:"trustedCA,omitempty"`
	CertificateChain string `json:"certificateChain,omitempty"`
	PrivateKey       string `json:"privateKey,omitempty"`
}

TLS context holds the secret values resolved from an 'api.TLSContext'

func (*TLSContext) Equal added in v0.15.7 

func (a *TLSContext) Equal(b *TLSContext) bool

Equal returns true if 'a' and 'b' have the same contents.

func (*TLSContext) MarshalJSON added in v0.15.7 

func (t *TLSContext) MarshalJSON() ([]byte, error)

MarshalJSON marsahls a redacted version of the TLSContext. We want to see which fields are present, but not reveal their values in any logs, etc.

type TLSDirection added in v0.15.7 

type TLSDirection string
const (
	TerminatingTLS TLSDirection = "terminating"
	OriginatingTLS TLSDirection = "originating"
)

type Tracing 

type Tracing int
const (
	TRACE_DISABLED Tracing = iota
	TRACE_ENABLED
	TRACE_VERBOSE
)

type TranslationResult added in v0.15.7 

type TranslationResult struct {
	// NumToServicesRules is the number of ToServices rules processed while
	// translating the rules
	NumToServicesRules int
}

TranslationResult contains the results of the rule translation

type Translator added in v0.15.7 

type Translator interface {
	Translate(*api.Rule, *TranslationResult) error
}

Translator is an interface for altering policy rules

type VisibilityMetadata added in v0.15.7 

type VisibilityMetadata struct {
	// Parser represents the proxy to which traffic should be redirected.
	Parser L7ParserType

	// Port, in tandem with Proto, signifies which L4 port for which traffic
	// should be redirected.
	Port uint16

	// Proto, in tandem with port, signifies which L4 protocol for which traffic
	// should be redirected.
	Proto u8proto.U8proto

	// Ingress specifies whether ingress traffic at the given L4 port / protocol
	// should be redirected to the proxy.
	Ingress bool

	// L7Metadata encodes optional information what is allowed at L7 for
	// visibility. Some specific protocol parsers do not need this set for
	// allowing of traffic (e.g., HTTP), but some do (e.g., DNS).
	L7Metadata L7DataMap
}

VisibilityMetadata encodes state about what type of traffic should be redirected to an L7Proxy. Implements the ProxyPolicy interface. TODO: an L4Filter could be composed of this type.

func (*VisibilityMetadata) CopyL7RulesPerEndpoint added in v0.15.7 

func (v *VisibilityMetadata) CopyL7RulesPerEndpoint() L7DataMap

CopyL7RulesPerEndpoint returns a shallow copy of the L7Metadata of the L4Filter.

func (*VisibilityMetadata) GetIngress added in v0.15.7 

func (v *VisibilityMetadata) GetIngress() bool

GetIngress returns whether the VisibilityMetadata applies at ingress or egress.

func (*VisibilityMetadata) GetL7Parser added in v0.15.7 

func (v *VisibilityMetadata) GetL7Parser() L7ParserType

GetL7Parser returns the L7ParserType for this VisibilityMetadata.

func (*VisibilityMetadata) GetPort added in v0.15.7 

func (v *VisibilityMetadata) GetPort() uint16

GetPort returns at which port the VisibilityMetadata applies.

type VisibilityPolicy added in v0.15.7 

type VisibilityPolicy struct {
	Ingress DirectionalVisibilityPolicy
	Egress  DirectionalVisibilityPolicy
	Error   error
}

VisibilityPolicy represents for both ingress and egress which types of traffic should be redirected to a given L7 proxy.

func NewVisibilityPolicy added in v0.15.7 

func NewVisibilityPolicy(anno string) (*VisibilityPolicy, error)

NewVisibilityPolicy generates the VisibilityPolicy that is encoded in the annotation parameter. Returns an error:

  • if the annotation does not correspond to the expected format for a visibility annotation.
  • if there is a conflict between the state encoded in the annotation (e.g., different L7 protocols for the same L4 port / protocol / traffic direction.

Source Files

View all Source files

Directories

Path Synopsis
Package api defines the API of the Cilium network policy interface +groupName=policy
 Package api defines the API of the Cilium network policy interface +groupName=policy
aws
package trafficdirection specifies the directionality of policy in a numeric representation.
 package trafficdirection specifies the directionality of policy in a numeric representation.

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.