Version: v0.0.0-...-ff5f600 Latest Latest

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Published: Apr 30, 2016 License: BSD-3-Clause Imports: 26 Imported by: 0




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var (
	ErrUnknownProtocol           = verror.Register("", verror.NoRetry, "{1:}{2:} unknown protocol{:3}")
	ErrManagerClosed             = verror.Register("", verror.NoRetry, "{1:}{2:} manager is already closed")
	ErrAcceptFailed              = verror.Register("", verror.NoRetry, "{1:}{2:} accept failed{:3}")
	ErrCacheClosed               = verror.Register("", verror.NoRetry, "{1:}{2:} cache is closed")
	ErrConnKilledToFreeResources = verror.Register("", verror.NoRetry, "{1:}{2:} Connection killed to free resources.")
	ErrInvalidProxyResponse      = verror.Register("", verror.NoRetry, "{1:}{2:} Invalid proxy response{:3}")
	ErrManagerDialingSelf        = verror.Register("", verror.NoRetry, "{1:}{2:} manager cannot be used to dial itself")
	ErrListeningWithNullRid      = verror.Register("", verror.NoRetry, "{1:}{2:} manager cannot listen when created with NullRoutingID")
	ErrProxyResponse             = verror.Register("", verror.NoRetry, "{1:}{2:} proxy returned{:3}")
	ErrNoBlessingsForPeer        = verror.Register("", verror.NoRetry, "{1:}{2:} no blessings tagged for peer {3}, rejected:{4}{:5}")
	ErrConnNotInCache            = verror.Register("", verror.NoRetry, "{1:}{2:} connection to {3} not in cache")


func New

func New(
	ctx *context.T,
	rid naming.RoutingID,
	dhcpPublisher *pubsub.Publisher,
	channelTimeout time.Duration,
	idleExpiry time.Duration,
	authorizedPeers []security.BlessingPattern) flow.Manager

New creates a new flow manager.

func NewErrAcceptFailed

func NewErrAcceptFailed(ctx *context.T, err error) error

NewErrAcceptFailed returns an error with the ErrAcceptFailed ID.

func NewErrCacheClosed

func NewErrCacheClosed(ctx *context.T) error

NewErrCacheClosed returns an error with the ErrCacheClosed ID.

func NewErrConnKilledToFreeResources

func NewErrConnKilledToFreeResources(ctx *context.T) error

NewErrConnKilledToFreeResources returns an error with the ErrConnKilledToFreeResources ID.

func NewErrConnNotInCache

func NewErrConnNotInCache(ctx *context.T, remote string) error

NewErrConnNotInCache returns an error with the ErrConnNotInCache ID.

func NewErrInvalidProxyResponse

func NewErrInvalidProxyResponse(ctx *context.T, typ string) error

NewErrInvalidProxyResponse returns an error with the ErrInvalidProxyResponse ID.

func NewErrListeningWithNullRid

func NewErrListeningWithNullRid(ctx *context.T) error

NewErrListeningWithNullRid returns an error with the ErrListeningWithNullRid ID.

func NewErrManagerClosed

func NewErrManagerClosed(ctx *context.T) error

NewErrManagerClosed returns an error with the ErrManagerClosed ID.

func NewErrManagerDialingSelf

func NewErrManagerDialingSelf(ctx *context.T) error

NewErrManagerDialingSelf returns an error with the ErrManagerDialingSelf ID.

func NewErrNoBlessingsForPeer

func NewErrNoBlessingsForPeer(ctx *context.T, peerNames []string, rejected []security.RejectedBlessing, err error) error

NewErrNoBlessingsForPeer returns an error with the ErrNoBlessingsForPeer ID.

func NewErrProxyResponse

func NewErrProxyResponse(ctx *context.T, msg string) error

NewErrProxyResponse returns an error with the ErrProxyResponse ID.

func NewErrUnknownProtocol

func NewErrUnknownProtocol(ctx *context.T, protocol string) error

NewErrUnknownProtocol returns an error with the ErrUnknownProtocol ID.


type ConnCache

type ConnCache struct {
	// contains filtered or unexported fields

ConnCache is a cache of Conns keyed by (protocol, address) and (routingID). Multiple goroutines can invoke methods on the ConnCache simultaneously.

func NewConnCache

func NewConnCache(idleExpiry time.Duration) *ConnCache

NewConnCache creates a conncache with and idleExpiry for connections. If idleExpiry is zero, connections will never expire.

func (*ConnCache) Close

func (c *ConnCache) Close(ctx *context.T)

Close marks the ConnCache as closed and closes all Conns in the cache.

func (*ConnCache) EnterLameDuckMode

func (c *ConnCache) EnterLameDuckMode(ctx *context.T)

func (*ConnCache) Find

func (c *ConnCache) Find(ctx *context.T, remote naming.Endpoint, network, address string, auth flow.PeerAuthorizer,
	p flow.Protocol) (conn *conn.Conn, names []string, rejected []security.RejectedBlessing, err error)

Find returns a Conn based on the input remoteEndpoint. nil is returned if there is no such Conn.

Find will return an error iff the cache is closed. If no error is returned, the caller is required to call Unreserve, to avoid deadlock. The (protocol, address) provided to Unreserve must be the same as the arguments provided to Find. All new Find calls for the (protocol, address) will Block until the corresponding Unreserve call is made. p is used to check the cache for resolved protocols.

func (*ConnCache) FindWithRoutingID

func (c *ConnCache) FindWithRoutingID(ctx *context.T, remote naming.Endpoint,
	auth flow.PeerAuthorizer) (conn *conn.Conn, names []string, rejected []security.RejectedBlessing, err error)

Find returns a Conn based only on the RoutingID of remote.

func (*ConnCache) Insert

func (c *ConnCache) Insert(conn *conn.Conn, proxy bool) error

Insert adds conn to the cache, keyed by both (protocol, address) and (routingID) An error will be returned iff the cache has been closed.

func (*ConnCache) InsertWithRoutingID

func (c *ConnCache) InsertWithRoutingID(conn *conn.Conn, proxy bool) error

InsertWithRoutingID adds conn to the cache keyed only by conn's RoutingID.

func (*ConnCache) KillConnections

func (c *ConnCache) KillConnections(ctx *context.T, num int) error

KillConnections will closes at least num Conns in the cache. This is useful when the manager is approaching system FD limits.

The policy is as follows: (1) Remove undialable conns from the cache, there is no point

in closing undialable connections to address a FD limit.

(2) Close and remove lameducked, expired connections from the cache,

counting non-proxied connections towards the removed FD count (num).

(3) LameDuck idle expired connections, killing them if num is still greater

than 0.

(4) Finally if 'num' hasn't been reached, remove the LRU remaining conns

until num is reached.

If num is greater than the number of connections in the cache, all cached connections will be closed and removed. KillConnections returns an error iff the cache is closed.

func (*ConnCache) String

func (c *ConnCache) String() string

func (*ConnCache) Unreserve

func (c *ConnCache) Unreserve(protocol, address string)

Unreserve marks the status of the (protocol, address) as no longer started, and broadcasts waiting threads.

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