ice

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 Go to latest Published: Apr 29, 2019 License: MIT Imports: 17 Imported by: 8

README


Pion ICE

A Go implementation of ICE

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Roadmap

The library is used as a part of our WebRTC implementation. Please refer to that roadmap to track our major milestones.

Community

Pion has an active community on the Golang Slack. Sign up and join the #pion channel for discussions and support. You can also use Pion mailing list.

We are always looking to support your projects. Please reach out if you have something to build!

If you need commercial support or don't want to use public methods you can contact us at team@pion.ly

Contributing

Check out the contributing wiki to join the group of amazing people making this project possible:

License

MIT License - see LICENSE for full text

Documentation

Overview

Package ice implements the Interactive Connectivity Establishment (ICE) protocol defined in rfc5245.

Index

Constants

View Source 
const (

	// ComponentRTP indicates that the candidate is used for RTP
	ComponentRTP uint16 = 1
	// ComponentRTCP indicates that the candidate is used for RTCP
	ComponentRTCP
)
View Source 
const (
	// ConnectionStateNew ICE agent is gathering addresses
	ConnectionStateNew = iota + 1

	// ConnectionStateChecking ICE agent has been given local and remote candidates, and is attempting to find a match
	ConnectionStateChecking

	// ConnectionStateConnected ICE agent has a pairing, but is still checking other pairs
	ConnectionStateConnected

	// ConnectionStateCompleted ICE agent has finished
	ConnectionStateCompleted

	// ConnectionStateFailed ICE agent never could successfully connect
	ConnectionStateFailed

	// ConnectionStateDisconnected ICE agent connected successfully, but has entered a failed state
	ConnectionStateDisconnected

	// ConnectionStateClosed ICE agent has finished and is no longer handling requests
	ConnectionStateClosed
)

List of supported States

View Source 
const Unknown = iota

Unknown defines default public constant to use for "enum" like struct comparisons when no value was defined.

Variables

View Source 
var (
	// ErrUnknownType indicates an error with Unknown info.
	ErrUnknownType = errors.New("Unknown")

	// ErrSchemeType indicates the scheme type could not be parsed.
	ErrSchemeType = errors.New("unknown scheme type")

	// ErrSTUNQuery indicates query arguments are provided in a STUN URL.
	ErrSTUNQuery = errors.New("queries not supported in stun address")

	// ErrInvalidQuery indicates an malformed query is provided.
	ErrInvalidQuery = errors.New("invalid query")

	// ErrHost indicates malformed hostname is provided.
	ErrHost = errors.New("invalid hostname")

	// ErrPort indicates malformed port is provided.
	ErrPort = errors.New("invalid port")

	// ErrProtoType indicates an unsupported transport type was provided.
	ErrProtoType = errors.New("invalid transport protocol type")

	// ErrClosed indicates the agent is closed
	ErrClosed = errors.New("the agent is closed")

	// ErrNoCandidatePairs indicates agent does not have a valid candidate pair
	ErrNoCandidatePairs = errors.New("no candidate pairs available")

	// ErrCanceledByCaller indicates agent connection was canceled by the caller
	ErrCanceledByCaller = errors.New("connecting canceled by caller")

	// ErrMultipleStart indicates agent was started twice
	ErrMultipleStart = errors.New("attempted to start agent twice")

	// ErrRemoteUfragEmpty indicates agent was started with an empty remote ufrag
	ErrRemoteUfragEmpty = errors.New("remote ufrag is empty")

	// ErrRemotePwdEmpty indicates agent was started with an empty remote pwd
	ErrRemotePwdEmpty = errors.New("remote pwd is empty")
)

Functions

This section is empty.

Types

type Agent 

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

Agent represents the ICE agent

func NewAgent 

func NewAgent(config *AgentConfig) (*Agent, error)

NewAgent creates a new Agent

func (*Agent) Accept 

func (a *Agent) Accept(ctx context.Context, remoteUfrag, remotePwd string) (*Conn, error)

Accept connects to the remote agent, acting as the controlled ice agent. Accept blocks until at least one ice candidate pair has successfully connected.

func (*Agent) AddRemoteCandidate 

func (a *Agent) AddRemoteCandidate(c *Candidate) error

AddRemoteCandidate adds a new remote candidate

func (*Agent) Close 

func (a *Agent) Close() error

Close cleans up the Agent

func (*Agent) Dial 

func (a *Agent) Dial(ctx context.Context, remoteUfrag, remotePwd string) (*Conn, error)

Dial connects to the remote agent, acting as the controlling ice agent. Dial blocks until at least one ice candidate pair has successfully connected.

func (*Agent) GetLocalCandidates 

func (a *Agent) GetLocalCandidates() ([]*Candidate, error)

GetLocalCandidates returns the local candidates

func (*Agent) GetLocalUserCredentials 

func (a *Agent) GetLocalUserCredentials() (frag string, pwd string)

GetLocalUserCredentials returns the local user credentials

func (*Agent) OnConnectionStateChange 

func (a *Agent) OnConnectionStateChange(f func(ConnectionState)) error

OnConnectionStateChange sets a handler that is fired when the connection state changes

func (*Agent) OnSelectedCandidatePairChange 

func (a *Agent) OnSelectedCandidatePairChange(f func(*Candidate, *Candidate)) error

OnSelectedCandidatePairChange sets a handler that is fired when the final candidate pair is selected

type AgentConfig 

type AgentConfig struct {
	Urls []*URL

	// PortMin and PortMax are optional. Leave them 0 for the default UDP port allocation strategy.
	PortMin uint16
	PortMax uint16

	// ConnectionTimeout defaults to 30 seconds when this property is nil.
	// If the duration is 0, we will never timeout this connection.
	ConnectionTimeout *time.Duration
	// KeepaliveInterval determines how often should we send ICE
	// keepalives (should be less then connectiontimeout above)
	// when this is nil, it defaults to 10 seconds.
	// A keepalive interval of 0 means we never send keepalive packets
	KeepaliveInterval *time.Duration

	// NetworkTypes is an optional configuration for disabling or enablding
	// support for specific network types.
	NetworkTypes []NetworkType

	LoggerFactory logging.LoggerFactory
	// contains filtered or unexported fields
}

AgentConfig collects the arguments to ice.Agent construction into a single structure, for future-proofness of the interface

type Candidate 

type Candidate struct {
	NetworkType

	Type            CandidateType
	LocalPreference uint16
	Component       uint16
	IP              net.IP
	Port            int
	RelatedAddress  *CandidateRelatedAddress
	// contains filtered or unexported fields
}

Candidate represents an ICE candidate

func NewCandidateHost 

func NewCandidateHost(network string, ip net.IP, port int, component uint16) (*Candidate, error)

NewCandidateHost creates a new host candidate

func NewCandidatePeerReflexive 

func NewCandidatePeerReflexive(network string, ip net.IP, port int, component uint16, relAddr string, relPort int) (*Candidate, error)

NewCandidatePeerReflexive creates a new peer reflective candidate

func NewCandidateRelay 

func NewCandidateRelay(network string, ip net.IP, port int, component uint16, relAddr string, relPort int) (*Candidate, error)

NewCandidateRelay creates a new relay candidate

func NewCandidateServerReflexive 

func NewCandidateServerReflexive(network string, ip net.IP, port int, component uint16, relAddr string, relPort int) (*Candidate, error)

NewCandidateServerReflexive creates a new server reflective candidate

func (*Candidate) Equal 

func (c *Candidate) Equal(other *Candidate) bool

Equal is used to compare two CandidateBases

func (*Candidate) LastReceived 

func (c *Candidate) LastReceived() time.Time

LastReceived returns a time.Time indicating the last time this candidate was received

func (*Candidate) LastSent 

func (c *Candidate) LastSent() time.Time

LastSent returns a time.Time indicating the last time this candidate was sent

func (*Candidate) Priority 

func (c *Candidate) Priority() uint32

Priority computes the priority for this ICE Candidate

func (*Candidate) String 

func (c *Candidate) String() string

String makes the CandidateHost printable

type CandidateRelatedAddress 

type CandidateRelatedAddress struct {
	Address string
	Port    int
}

CandidateRelatedAddress convey transport addresses related to the candidate, useful for diagnostics and other purposes.

func (*CandidateRelatedAddress) Equal 

func (c *CandidateRelatedAddress) Equal(other *CandidateRelatedAddress) bool

Equal allows comparing two CandidateRelatedAddresses. The CandidateRelatedAddress are allowed to be nil.

func (*CandidateRelatedAddress) String 

func (c *CandidateRelatedAddress) String() string

String makes CandidateRelatedAddress printable

type CandidateType 

type CandidateType byte

CandidateType represents the type of candidate 

const (
	CandidateTypeHost CandidateType = iota + 1
	CandidateTypeServerReflexive
	CandidateTypePeerReflexive
	CandidateTypeRelay
)

CandidateType enum

func (CandidateType) Preference 

func (c CandidateType) Preference() uint16

Preference returns the preference weight of a CandidateType

4.1.2.2. Guidelines for Choosing Type and Local Preferences The RECOMMENDED values are 126 for host candidates, 100 for server reflexive candidates, 110 for peer reflexive candidates, and 0 for relayed candidates.

func (CandidateType) String 

func (c CandidateType) String() string

String makes CandidateType printable

type Conn 

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

Conn represents the ICE connection. At the moment the lifetime of the Conn is equal to the Agent.

func (*Conn) Close 

func (c *Conn) Close() error

Close implements the Conn Close method. It is used to close the connection. Any calls to Read and Write will be unblocked and return an error.

func (*Conn) LocalAddr 

func (c *Conn) LocalAddr() net.Addr

LocalAddr is a stub

func (*Conn) Read 

func (c *Conn) Read(p []byte) (int, error)

Read implements the Conn Read method.

func (*Conn) RemoteAddr 

func (c *Conn) RemoteAddr() net.Addr

RemoteAddr is a stub

func (*Conn) SetDeadline 

func (c *Conn) SetDeadline(t time.Time) error

SetDeadline is a stub

func (*Conn) SetReadDeadline 

func (c *Conn) SetReadDeadline(t time.Time) error

SetReadDeadline is a stub

func (*Conn) SetWriteDeadline 

func (c *Conn) SetWriteDeadline(t time.Time) error

SetWriteDeadline is a stub

func (*Conn) Write 

func (c *Conn) Write(p []byte) (int, error)

Write implements the Conn Write method.

type ConnectionState 

type ConnectionState int

ConnectionState is an enum showing the state of a ICE Connection

func (ConnectionState) String 

func (c ConnectionState) String() string

type GatheringState 

type GatheringState int

GatheringState describes the state of the candidate gathering process 

const (
	// GatheringStateNew indicates candidate gatering is not yet started
	GatheringStateNew GatheringState = iota + 1

	// GatheringStateGathering indicates candidate gatering is ongoing
	GatheringStateGathering

	// GatheringStateComplete indicates candidate gatering has been completed
	GatheringStateComplete
)

func (GatheringState) String 

func (t GatheringState) String() string

type NetworkType 

type NetworkType int

NetworkType represents the type of network 

const (
	// NetworkTypeUDP4 indicates UDP over IPv4.
	NetworkTypeUDP4 NetworkType = iota + 1

	// NetworkTypeUDP6 indicates UDP over IPv6.
	NetworkTypeUDP6

	// NetworkTypeTCP4 indicates TCP over IPv4.
	NetworkTypeTCP4

	// NetworkTypeTCP6 indicates TCP over IPv6.
	NetworkTypeTCP6
)

func (NetworkType) IsIPv4 

func (t NetworkType) IsIPv4() bool

IsIPv4 returns whether the network type is IPv4 or not.

func (NetworkType) IsIPv6 

func (t NetworkType) IsIPv6() bool

IsIPv6 returns whether the network type is IPv6 or not.

func (NetworkType) IsReliable 

func (t NetworkType) IsReliable() bool

IsReliable returns true if the network is reliable

func (NetworkType) NetworkShort 

func (t NetworkType) NetworkShort() string

NetworkShort returns the short network description

func (NetworkType) String 

func (t NetworkType) String() string

type ProtoType 

type ProtoType int

ProtoType indicates the transport protocol type that is used in the ice.URL structure. 

const (
	// ProtoTypeUDP indicates the URL uses a UDP transport.
	ProtoTypeUDP ProtoType = iota + 1

	// ProtoTypeTCP indicates the URL uses a TCP transport.
	ProtoTypeTCP
)

func NewProtoType 

func NewProtoType(raw string) ProtoType

NewProtoType defines a procedure for creating a new ProtoType from a raw string naming the transport protocol type.

func (ProtoType) String 

func (t ProtoType) String() string

type SchemeType 

type SchemeType int

SchemeType indicates the type of server used in the ice.URL structure. 

const (
	// SchemeTypeSTUN indicates the URL represents a STUN server.
	SchemeTypeSTUN SchemeType = iota + 1

	// SchemeTypeSTUNS indicates the URL represents a STUNS (secure) server.
	SchemeTypeSTUNS

	// SchemeTypeTURN indicates the URL represents a TURN server.
	SchemeTypeTURN

	// SchemeTypeTURNS indicates the URL represents a TURNS (secure) server.
	SchemeTypeTURNS
)

func NewSchemeType 

func NewSchemeType(raw string) SchemeType

NewSchemeType defines a procedure for creating a new SchemeType from a raw string naming the scheme type.

func (SchemeType) String 

func (t SchemeType) String() string

type URL 

type URL struct {
	Scheme SchemeType
	Host   string
	Port   int
	Proto  ProtoType
}

URL represents a STUN (rfc7064) or TURN (rfc7065) URL

func ParseURL 

func ParseURL(raw string) (*URL, error)

ParseURL parses a STUN or TURN urls following the ABNF syntax described in https://tools.ietf.org/html/rfc7064 and https://tools.ietf.org/html/rfc7065 respectively.

func (URL) IsSecure 

func (u URL) IsSecure() bool

IsSecure returns whether the this URL's scheme describes secure scheme or not.

func (URL) String 

func (u URL) String() string

Source Files

View all Source files

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