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enforcer.go
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/
enforcer.go
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package enforcer
import (
"context"
"fmt"
"time"
"go.aporeto.io/trireme-lib/collector"
"go.aporeto.io/trireme-lib/controller/constants"
"go.aporeto.io/trireme-lib/controller/internal/enforcer/applicationproxy"
"go.aporeto.io/trireme-lib/controller/internal/enforcer/nfqdatapath"
"go.aporeto.io/trireme-lib/controller/internal/enforcer/nfqdatapath/tokenaccessor"
"go.aporeto.io/trireme-lib/controller/internal/enforcer/secretsproxy"
"go.aporeto.io/trireme-lib/controller/internal/portset"
"go.aporeto.io/trireme-lib/controller/pkg/fqconfig"
"go.aporeto.io/trireme-lib/controller/pkg/packetprocessor"
"go.aporeto.io/trireme-lib/controller/pkg/secrets"
"go.aporeto.io/trireme-lib/policy"
"go.aporeto.io/trireme-lib/utils/cache"
"go.uber.org/zap"
)
// A Enforcer is an implementation of the enforcer datapath. The interface
// can be implemented by one or multiple datapaths.
type Enforcer interface {
// Enforce starts enforcing policies for the given policy.PUInfo.
Enforce(contextID string, puInfo *policy.PUInfo) error
// Unenforce stops enforcing policy for the given IP.
Unenforce(contextID string) error
// GetFilterQueue returns the current FilterQueueConfig.
GetFilterQueue() *fqconfig.FilterQueue
// GetPortSetInstance returns nil for the proxy
GetPortSetInstance() portset.PortSet
// Run starts the PolicyEnforcer.
Run(ctx context.Context) error
// UpdateSecrets -- updates the secrets of running enforcers managed by trireme. Remote enforcers will get the secret updates with the next policy push
UpdateSecrets(secrets secrets.Secrets) error
SetTargetNetworks(networks []string) error
}
// enforcer holds all the active implementations of the enforcer
type enforcer struct {
proxy *applicationproxy.AppProxy
transport *nfqdatapath.Datapath
secrets *secretsproxy.SecretsProxy
}
// Run implements the run interfaces and runs the individual data paths
func (e *enforcer) Run(ctx context.Context) error {
if e.proxy != nil {
if err := e.proxy.Run(ctx); err != nil {
return err
}
}
if e.transport != nil {
if err := e.transport.Run(ctx); err != nil {
return err
}
}
if e.secrets != nil {
if err := e.secrets.Run(ctx); err != nil {
return err
}
}
return nil
}
// Enforce implements the enforce interface by sending the event to all the enforcers.
func (e *enforcer) Enforce(contextID string, puInfo *policy.PUInfo) error {
if e.transport != nil {
if err := e.transport.Enforce(contextID, puInfo); err != nil {
return fmt.Errorf("Failed to enforce in nfq: %s", err)
}
}
if e.proxy != nil {
if err := e.proxy.Enforce(context.Background(), contextID, puInfo); err != nil {
return fmt.Errorf("Failed to enforce in proxy: %s", err)
}
}
if e.secrets != nil {
if err := e.secrets.Enforce(context.Background(), contextID, puInfo); err != nil {
return fmt.Errorf("Failed to enforce in secrets proxy: %s", err)
}
}
return nil
}
// Unenforce implements the Unenforce interface by sending the event to all the enforcers.
func (e *enforcer) Unenforce(contextID string) error {
var perr, nerr, serr error
if e.proxy != nil {
if perr = e.proxy.Unenforce(context.Background(), contextID); perr != nil {
zap.L().Error("Failed to unenforce contextID in proxy",
zap.String("ContextID", contextID),
zap.Error(perr),
)
}
}
if e.transport != nil {
if nerr = e.transport.Unenforce(contextID); nerr != nil {
zap.L().Error("Failed to unenforce contextID in transport",
zap.String("ContextID", contextID),
zap.Error(nerr),
)
}
}
if e.secrets != nil {
if serr = e.secrets.Unenforce(contextID); nerr != nil {
zap.L().Error("Failed to unenforce contextID in transport",
zap.String("ContextID", contextID),
zap.Error(nerr),
)
}
}
if perr != nil || nerr != nil || serr != nil {
return fmt.Errorf("Failed to unenforce %s %s", perr, nerr)
}
return nil
}
func (e *enforcer) SetTargetNetworks(networks []string) error {
return e.transport.SetTargetNetworks(networks)
}
// Updatesecrets updates the secrets of the enforcers
func (e *enforcer) UpdateSecrets(secrets secrets.Secrets) error {
if e.proxy != nil {
if err := e.proxy.UpdateSecrets(secrets); err != nil {
return err
}
}
if e.transport != nil {
if err := e.transport.UpdateSecrets(secrets); err != nil {
return err
}
}
if e.secrets != nil {
if err := e.secrets.UpdateSecrets(secrets); err != nil {
return err
}
}
return nil
}
// GetFilterQueue returns the current FilterQueueConfig of the transport path.
func (e *enforcer) GetFilterQueue() *fqconfig.FilterQueue {
return e.transport.GetFilterQueue()
}
// GetPortSetInstance returns the port instance of the transport datapath
func (e *enforcer) GetPortSetInstance() portset.PortSet {
return e.transport.GetPortSetInstance()
}
// New returns a new policy enforcer that implements both the data paths.
func New(
mutualAuthorization bool,
fqConfig *fqconfig.FilterQueue,
collector collector.EventCollector,
service packetprocessor.PacketProcessor,
secrets secrets.Secrets,
serverID string,
validity time.Duration,
mode constants.ModeType,
procMountPoint string,
externalIPCacheTimeout time.Duration,
packetLogs bool,
targetNetworks []string,
) (Enforcer, error) {
tokenAccessor, err := tokenaccessor.New(serverID, validity, secrets)
if err != nil {
zap.L().Fatal("Cannot create a token engine")
}
puFromContextID := cache.NewCache("puFromContextID")
transport := nfqdatapath.New(
mutualAuthorization,
fqConfig,
collector,
serverID,
validity,
service,
secrets,
mode,
procMountPoint,
externalIPCacheTimeout,
packetLogs,
tokenAccessor,
puFromContextID,
targetNetworks,
)
tcpProxy, err := applicationproxy.NewAppProxy(tokenAccessor, collector, puFromContextID, nil, secrets)
if err != nil {
return nil, err
}
return &enforcer{
proxy: tcpProxy,
transport: transport,
secrets: secretsproxy.NewSecretsProxy(),
}, nil
}
// NewWithDefaults create a new data path with most things used by default
func NewWithDefaults(
serverID string,
collector collector.EventCollector,
service packetprocessor.PacketProcessor,
secrets secrets.Secrets,
mode constants.ModeType,
procMountPoint string,
targetNetworks []string,
) Enforcer {
return nfqdatapath.NewWithDefaults(
serverID,
collector,
service,
secrets,
mode,
procMountPoint,
targetNetworks,
)
}