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netio.go
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netio.go
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package qln
import (
"fmt"
"github.com/mit-dci/lit/crypto/koblitz"
"github.com/mit-dci/lit/lncore"
"github.com/mit-dci/lit/lnutil"
"github.com/mit-dci/lit/logging"
"strings"
)
// GetLisAddressAndPorts .
// Gets the list of ports where LitNode is listening for incoming connections,
// & the connection key
func (nd *LitNode) GetLisAddressAndPorts() (string, []string) {
return nd.PeerMan.GetExternalAddress(), nd.PeerMan.GetListeningAddrs()
}
// FindPeerIndexByAddress finds the peer index by address.
// TODO Remove this function.
func (nd *LitNode) FindPeerIndexByAddress(lnAdr string) (uint32, error) {
pm := nd.PeerMan
lnaddr, err := lncore.ParseLnAddr(lnAdr)
if err != nil {
return 0, err
}
p := pm.GetPeer(lnaddr)
if p != nil {
return p.GetIdx(), nil
}
return 0, fmt.Errorf("Node %s not found", lnAdr)
}
// TCPListener starts a litNode listening for incoming LNDC connections.
func (nd *LitNode) TCPListener(port int) (string, error) {
logging.Debugf("Trying to listen on %s\n", port)
err := nd.PeerMan.ListenOnPort(port)
if err != nil {
return "", err
}
lnaddr := nd.PeerMan.GetExternalAddress()
logging.Infof("Listening with ln address: %s \n", lnaddr)
// Don't announce on the tracker if we are communicating via SOCKS proxy
if nd.ProxyURL == "" {
go GoAnnounce(nd.IdKey(), port, lnaddr, nd.TrackerURL)
}
return lnaddr, nil
}
func GoAnnounce(priv *koblitz.PrivateKey, port int, litadr string, trackerURL string) {
err := lnutil.Announce(priv, port, litadr, trackerURL)
if err != nil {
logging.Errorf("Announcement error %s", err.Error())
}
}
// ParseAdrString splits a string like
// "ln1yrvw48uc3atg8e2lzs43mh74m39vl785g4ehem@myhost.co:8191" into a separate
// pkh part and network part, adding the network part if needed
func splitAdrString(adr string) (string, string) {
if !strings.ContainsRune(adr, ':') && strings.ContainsRune(adr, '@') {
adr += ":2448"
}
idHost := strings.Split(adr, "@")
if len(idHost) == 1 {
return idHost[0], ""
}
return idHost[0], idHost[1]
}
// DialPeer makes an outgoing connection to another node.
// TODO Remove this.
func (nd *LitNode) DialPeer(connectAdr string) error {
_, err := nd.PeerMan.TryConnectAddress(connectAdr)
if err != nil {
return err
}
// TEMP The event handler handles actually setting up the peer in the LitNode
return nil
}
func (nd *LitNode) tmpSendLitMsg(msg lnutil.LitMsg) {
if !nd.ConnectedToPeer(msg.Peer()) {
logging.Debugf("message type %x to peer %d but not connected\n",
msg.MsgType(), msg.Peer())
return
}
buf := msg.Bytes()
// Just wrap it and forward it off to the underlying infrastructure.
// There's some byte fenagling that we have to do to get all this to work right.
np := nd.PeerMan.GetPeerByIdx(int32(msg.Peer()))
np.SendImmediateMessage(LitMsgWrapperMessage{buf[0], buf[1:]}) // being blocking might not be a huge issue here possibly?
}
// SimplePeerInfo .
type SimplePeerInfo struct {
PeerNumber uint32
RemoteHost string
Nickname string
LitAdr string
}
// GetConnectedPeerList .
func (nd *LitNode) GetConnectedPeerList() []SimplePeerInfo {
peers := make([]SimplePeerInfo, 0)
for k := range nd.PeerMap {
spi := SimplePeerInfo{
PeerNumber: nd.PeerMan.GetPeerIdx(k),
RemoteHost: k.GetRemoteAddr(),
Nickname: k.GetNickname(),
LitAdr: string(k.GetLnAddr()),
}
peers = append(peers, spi)
}
return peers
}
// ConnectedToPeer checks whether you're connected to a specific peer
func (nd *LitNode) ConnectedToPeer(peer uint32) bool {
// TODO Upgrade this to the new system.
nd.RemoteMtx.Lock()
defer nd.RemoteMtx.Unlock()
_, ok := nd.RemoteCons[peer]
return ok
}
// IdKey returns the identity private key
func (nd *LitNode) IdKey() *koblitz.PrivateKey {
return nd.IdentityKey
}
// SendChat sends a text string to a peer
func (nd *LitNode) SendChat(peer uint32, chat string) error {
if !nd.ConnectedToPeer(peer) {
return fmt.Errorf("Not connected to peer %d", peer)
}
outMsg := lnutil.NewChatMsg(peer, chat)
nd.tmpSendLitMsg(outMsg)
return nil
}