net

Documentation

Index

• func FirstTCPAddr(h *Host) string
• func GenerateIdentityB64() (string, error)
• func PrivateKeyFromB64(encoded string) (crypto.PrivKey, error)
• type BLEWebRTCUpgrader
  • func NewBLEWebRTCUpgrader(myNickname string) *BLEWebRTCUpgrader
  • func (u *BLEWebRTCUpgrader) OnBLEPeerFound(ctx context.Context, peerNickname, peerUUID string)
  • func (u *BLEWebRTCUpgrader) OnSDPReceived(ctx context.Context, peerUUID, sdp string, isOffer bool)
• type Host
  • func NewHost(ctx context.Context, nickname string) (*Host, error)
  • func NewHostWithIdentity(ctx context.Context, nickname string, priv crypto.PrivKey) (*Host, error)
  • func (h *Host) AttachDiscovery(mgr *discovery.Manager)
  • func (h *Host) Close() error
  • func (h *Host) ConnectByAddr(ctx context.Context, addrStr string) (PeerInfo, error)
  • func (h *Host) FindByNickname(ctx context.Context, nickname string) (peer.AddrInfo, error)
  • func (h *Host) LookupNickname(id peer.ID) (string, bool)
  • func (h *Host) NicknameFor(id peer.ID) string
  • func (h *Host) RememberNickname(id peer.ID, nickname string)
  • func (h *Host) StartDHTDiscovery(ctx context.Context, mgr *discovery.Manager)
• type PeerInfo
• type WebRTCConn
  • func NewWebRTCAnswer(ctx context.Context, offerSDP string, turnServers []config.TURNServer) (*WebRTCConn, string, error)
  • func NewWebRTCOffer(ctx context.Context, turnServers []config.TURNServer) (*WebRTCConn, string, error)
  • func (c *WebRTCConn) Close() error
  • func (c *WebRTCConn) Connected() <-chan struct{}
  • func (c *WebRTCConn) DataChannelOpen() <-chan struct{}
  • func (c *WebRTCConn) Read(p []byte) (int, error)
  • func (c *WebRTCConn) SetAnswer(answerSDP string) error
  • func (c *WebRTCConn) Write(p []byte) (int, error)

Functions

func FirstTCPAddr

func FirstTCPAddr(h *Host) string

FirstTCPAddr returns the best TCP listen multiaddr of h (with peer ID appended). Prefers non-loopback addresses so the displayed address is reachable from other machines.

func GenerateIdentityB64

func GenerateIdentityB64() (string, error)

func PrivateKeyFromB64

func PrivateKeyFromB64(encoded string) (crypto.PrivKey, error)

Types

type BLEWebRTCUpgrader

type BLEWebRTCUpgrader struct {
	TURNServers []config.TURNServer

	// OnConnected is called when WebRTC data channel is ready.
	// source is "ble→webrtc".
	OnConnected func(peerUUID, peerNickname string, conn *WebRTCConn)
	OnLog       func(string)

	// BLE send functions (wired by service layer)
	SendOfferFn  func(peerUUID, sdp string)
	SendAnswerFn func(sdp string) // broadcast to all centrals
	// contains filtered or unexported fields
}

BLEWebRTCUpgrader manages WebRTC connection upgrades triggered by BLE discovery. Flow:

Initiator (lower nickname alphabetically):
  BLE peer found → create offer → send via BLE → receive answer → connected

Responder (higher nickname):
  BLE central subscribed → wait for offer → create answer → send via BLE → connected

func NewBLEWebRTCUpgrader

func NewBLEWebRTCUpgrader(myNickname string) *BLEWebRTCUpgrader

func (*BLEWebRTCUpgrader) OnBLEPeerFound

func (u *BLEWebRTCUpgrader) OnBLEPeerFound(ctx context.Context, peerNickname, peerUUID string)

OnBLEPeerFound is called when BLE discovers a peer. If we are the initiator, create and send an offer.

func (*BLEWebRTCUpgrader) OnSDPReceived

func (u *BLEWebRTCUpgrader) OnSDPReceived(ctx context.Context, peerUUID, sdp string, isOffer bool)

OnSDPReceived handles incoming SDP (offer or answer) from BLE.

type Host

type Host struct {
	Libp2p         host.Host
	Nickname       string
	OnConnected    func(peer.ID)
	OnDisconnected func(peer.ID)
	OnLog          func(string)
	// contains filtered or unexported fields
}

func NewHost

func NewHost(ctx context.Context, nickname string) (*Host, error)

func NewHostWithIdentity

func NewHostWithIdentity(ctx context.Context, nickname string, priv crypto.PrivKey) (*Host, error)

func (*Host) AttachDiscovery

func (h *Host) AttachDiscovery(mgr *discovery.Manager)

func (*Host) Close

func (h *Host) Close() error

func (*Host) ConnectByAddr

func (h *Host) ConnectByAddr(ctx context.Context, addrStr string) (PeerInfo, error)

ConnectByAddr connects to a peer by full multiaddr string (e.g., /ip4/1.2.3.4/tcp/4001/p2p/QmXxx)

func (*Host) FindByNickname

func (h *Host) FindByNickname(ctx context.Context, nickname string) (peer.AddrInfo, error)

FindByNickname searches the DHT for a peer advertising under the given nickname.

func (*Host) LookupNickname

func (h *Host) LookupNickname(id peer.ID) (string, bool)

func (*Host) NicknameFor

func (h *Host) NicknameFor(id peer.ID) string

func (*Host) RememberNickname

func (h *Host) RememberNickname(id peer.ID, nickname string)

func (*Host) StartDHTDiscovery

func (h *Host) StartDHTDiscovery(ctx context.Context, mgr *discovery.Manager)

StartDHTDiscovery advertises on the DHT and periodically finds peers.

type PeerInfo

type PeerInfo struct {
	ID       peer.ID
	Nickname string
	Addrs    []multiaddr.Multiaddr
	Source   string
}

type WebRTCConn

type WebRTCConn struct {
	OnClose func()
	// contains filtered or unexported fields
}

WebRTCConn wraps a pion PeerConnection with a reliable data channel. It implements io.ReadWriteCloser so it can carry bdpeer protocol frames. io.Pipe is used for the read path so transfer.ReadFrame (io.ReadFull) works correctly.

func NewWebRTCAnswer

func NewWebRTCAnswer(ctx context.Context, offerSDP string, turnServers []config.TURNServer) (*WebRTCConn, string, error)

NewWebRTCAnswer creates a peer connection from a remote offer and returns an SDP answer.

func NewWebRTCOffer

func NewWebRTCOffer(ctx context.Context, turnServers []config.TURNServer) (*WebRTCConn, string, error)

NewWebRTCOffer creates a peer connection and returns an SDP offer string. Call SetAnswer with the remote answer to complete the handshake.

func (*WebRTCConn) Close

func (c *WebRTCConn) Close() error

func (*WebRTCConn) Connected

func (c *WebRTCConn) Connected() <-chan struct{}

Connected returns a channel that closes when the ICE connection is established.

func (*WebRTCConn) DataChannelOpen

func (c *WebRTCConn) DataChannelOpen() <-chan struct{}

DataChannelOpen returns a channel that closes when the data channel is open and ready for writes. This fires after ICE + DTLS + SCTP handshakes complete — i.e., strictly after Connected(). Callers that write to the conn must wait on this channel before attempting writes to avoid io.ErrClosedPipe.

func (*WebRTCConn) Read

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

func (*WebRTCConn) SetAnswer

func (c *WebRTCConn) SetAnswer(answerSDP string) error

SetAnswer completes the offer side handshake with the remote answer SDP.

func (*WebRTCConn) Write

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