peer

package
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 Go to latest Published: Jan 3, 2016 License: MIT Imports: 15 Imported by: 0

Documentation

Overview

package peer implements an object used to represent peers in the ipfs network.

Index

Constants

View Source 
const (

	// TempAddrTTL is the ttl used for a short lived address
	TempAddrTTL = time.Second * 10

	// ProviderAddrTTL is the TTL of an address we've received from a provider.
	// This is also a temporary address, but lasts longer. After this expires,
	// the records we return will require an extra lookup.
	ProviderAddrTTL = time.Minute * 10

	// RecentlyConnectedAddrTTL is used when we recently connected to a peer.
	// It means that we are reasonably certain of the peer's address.
	RecentlyConnectedAddrTTL = time.Minute * 10

	// OwnObservedAddrTTL is used for our own external addresses observed by peers.
	OwnObservedAddrTTL = time.Minute * 10

	// PermanentAddrTTL is the ttl for a "permanent address" (e.g. bootstrap nodes)
	// if we haven't shipped you an update to ipfs in 356 days
	// we probably arent running the same bootstrap nodes...
	PermanentAddrTTL = time.Hour * 24 * 356

	// ConnectedAddrTTL is the ttl used for the addresses of a peer to whom
	// we're connected directly. This is basically permanent, as we will
	// clear them + re-add under a TempAddrTTL after disconnecting.
	ConnectedAddrTTL = PermanentAddrTTL
)
View Source 
const (
	// AddressTTL is the expiration time of addresses.
	AddressTTL = time.Hour
)

Variables

View Source 
var LatencyEWMASmoothing = 0.1

LatencyEWMASmooting governs the decay of the EWMA (the speed at which it changes). This must be a normalized (0-1) value. 1 is 100% change, 0 is no change.

Functions

func IDB58Encode 

func IDB58Encode(id ID) string

IDB58Encode returns b58-encoded string

func IDHexEncode 

func IDHexEncode(id ID) string

IDHexEncode returns b58-encoded string

Types

type AddrBook 

type AddrBook interface {

	// AddAddr calls AddAddrs(p, []ma.Multiaddr{addr}, ttl)
	AddAddr(p ID, addr ma.Multiaddr, ttl time.Duration)

	// AddAddrs gives AddrManager addresses to use, with a given ttl
	// (time-to-live), after which the address is no longer valid.
	// If the manager has a longer TTL, the operation is a no-op for that address
	AddAddrs(p ID, addrs []ma.Multiaddr, ttl time.Duration)

	// SetAddr calls mgr.SetAddrs(p, addr, ttl)
	SetAddr(p ID, addr ma.Multiaddr, ttl time.Duration)

	// SetAddrs sets the ttl on addresses. This clears any TTL there previously.
	// This is used when we receive the best estimate of the validity of an address.
	SetAddrs(p ID, addrs []ma.Multiaddr, ttl time.Duration)

	// Addresses returns all known (and valid) addresses for a given
	Addrs(p ID) []ma.Multiaddr

	// ClearAddresses removes all previously stored addresses
	ClearAddrs(p ID)
}

AddrBook is an interface that fits the new AddrManager. I'm patching it up in here to avoid changing a ton of the codebase.

type AddrManager 

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

AddrManager manages addresses. The zero-value is ready to be used.

func (*AddrManager) AddAddr 

func (mgr *AddrManager) AddAddr(p ID, addr ma.Multiaddr, ttl time.Duration)

AddAddr calls AddAddrs(p, []ma.Multiaddr{addr}, ttl)

func (*AddrManager) AddAddrs 

func (mgr *AddrManager) AddAddrs(p ID, addrs []ma.Multiaddr, ttl time.Duration)

AddAddrs gives AddrManager addresses to use, with a given ttl (time-to-live), after which the address is no longer valid. If the manager has a longer TTL, the operation is a no-op for that address

func (*AddrManager) Addrs 

func (mgr *AddrManager) Addrs(p ID) []ma.Multiaddr

Addresses returns all known (and valid) addresses for a given

func (*AddrManager) ClearAddrs 

func (mgr *AddrManager) ClearAddrs(p ID)

ClearAddresses removes all previously stored addresses

func (*AddrManager) Peers 

func (mgr *AddrManager) Peers() []ID

func (*AddrManager) SetAddr 

func (mgr *AddrManager) SetAddr(p ID, addr ma.Multiaddr, ttl time.Duration)

SetAddr calls mgr.SetAddrs(p, addr, ttl)

func (*AddrManager) SetAddrs 

func (mgr *AddrManager) SetAddrs(p ID, addrs []ma.Multiaddr, ttl time.Duration)

SetAddrs sets the ttl on addresses. This clears any TTL there previously. This is used when we receive the best estimate of the validity of an address.

type ID 

type ID string

ID represents the identity of a peer.

func IDB58Decode 

func IDB58Decode(s string) (ID, error)

IDB58Decode returns a b58-decoded Peer

func IDFromBytes 

func IDFromBytes(b []byte) (ID, error)

IDFromBytes cast a string to ID type, and validate the id to make sure it is a multihash.

func IDFromPrivateKey 

func IDFromPrivateKey(sk ic.PrivKey) (ID, error)

IDFromPrivateKey returns the Peer ID corresponding to sk

func IDFromPublicKey 

func IDFromPublicKey(pk ic.PubKey) (ID, error)

IDFromPublicKey returns the Peer ID corresponding to pk

func IDFromString 

func IDFromString(s string) (ID, error)

IDFromString cast a string to ID type, and validate the id to make sure it is a multihash.

func IDHexDecode 

func IDHexDecode(s string) (ID, error)

IDHexDecode returns a b58-decoded Peer

func PeerInfoIDs 

func PeerInfoIDs(pis []PeerInfo) []ID

func (ID) Loggable 

func (id ID) Loggable() map[string]interface{}

func (ID) MatchesPrivateKey 

func (id ID) MatchesPrivateKey(sk ic.PrivKey) bool

MatchesPrivateKey tests whether this ID was derived from sk

func (ID) MatchesPublicKey 

func (id ID) MatchesPublicKey(pk ic.PubKey) bool

MatchesPublicKey tests whether this ID was derived from pk

func (ID) Pretty 

func (id ID) Pretty() string

Pretty returns a b58-encoded string of the ID

func (ID) String 

func (id ID) String() string

String prints out the peer.

TODO(brian): ensure correctness at ID generation and enforce this by only exposing functions that generate IDs safely. Then any peer.ID type found in the codebase is known to be correct.

type IDSlice 

type IDSlice []ID

IDSlice for sorting peers

func (IDSlice) Len 

func (es IDSlice) Len() int

func (IDSlice) Less 

func (es IDSlice) Less(i, j int) bool

func (IDSlice) Swap 

func (es IDSlice) Swap(i, j int)

type KeyBook 

type KeyBook interface {
	PubKey(ID) ic.PubKey
	AddPubKey(ID, ic.PubKey) error

	PrivKey(ID) ic.PrivKey
	AddPrivKey(ID, ic.PrivKey) error
}

KeyBook tracks the Public keys of Peers.

type Metrics 

type Metrics interface {

	// RecordLatency records a new latency measurement
	RecordLatency(ID, time.Duration)

	// LatencyEWMA returns an exponentially-weighted moving avg.
	// of all measurements of a peer's latency.
	LatencyEWMA(ID) time.Duration
}

Metrics is just an object that tracks metrics across a set of peers.

func NewMetrics 

func NewMetrics() Metrics

type PeerInfo 

type PeerInfo struct {
	ID    ID
	Addrs []ma.Multiaddr
}

PeerInfo is a small struct used to pass around a peer with a set of addresses (and later, keys?). This is not meant to be a complete view of the system, but rather to model updates to the peerstore. It is used by things like the routing system.

func PeerInfos 

func PeerInfos(ps Peerstore, peers []ID) []PeerInfo

func (*PeerInfo) MarshalJSON 

func (pi *PeerInfo) MarshalJSON() ([]byte, error)

func (*PeerInfo) UnmarshalJSON 

func (pi *PeerInfo) UnmarshalJSON(b []byte) error

type Peerstore 

type Peerstore interface {
	AddrBook
	KeyBook
	Metrics

	// Peers returns a list of all peer.IDs in this Peerstore
	Peers() []ID

	// PeerInfo returns a peer.PeerInfo struct for given peer.ID.
	// This is a small slice of the information Peerstore has on
	// that peer, useful to other services.
	PeerInfo(ID) PeerInfo

	// Get/Put is a simple registry for other peer-related key/value pairs.
	// if we find something we use often, it should become its own set of
	// methods. this is a last resort.
	Get(id ID, key string) (interface{}, error)
	Put(id ID, key string, val interface{}) error
}

Peerstore provides a threadsafe store of Peer related information.

func NewPeerstore 

func NewPeerstore() Peerstore

NewPeerstore creates a threadsafe collection of peers.

type Set 

type Set map[ID]struct{}

Map maps a Peer ID to a struct.

Source Files

View all Source files

Directories

Path Synopsis
Package addr provides utility functions to handle peer addresses.
 Package addr provides utility functions to handle peer addresses.

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