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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| package node | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "bytes" | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/libp2p/go-libp2p/core/network" | ||
| "github.com/libp2p/go-libp2p/core/peer" | ||
| "github.com/libp2p/go-libp2p/core/protocol" | ||
| "github.com/multiformats/go-multiaddr" | ||
| "github.com/pdupub/go-pdu/node/db" | ||
| ) | ||
|
|
||
| func (n *Node) handleStream(s network.Stream) { | ||
| fmt.Println("Got a new stream!") | ||
| defer s.Close() | ||
|
|
||
| remotePeerID := s.Conn().RemotePeer() | ||
| remotePeerAddr := s.Conn().RemoteMultiaddr() | ||
|
|
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| remoteFullAddr := fmt.Sprintf("%s/p2p/%s", remotePeerAddr, remotePeerID) | ||
| fmt.Printf("Connected to peer: %s\n", remoteFullAddr) | ||
|
|
||
| buf := new(bytes.Buffer) | ||
| buf.ReadFrom(s) | ||
| message := buf.String() | ||
| fmt.Printf("Received message: %s\n", message) | ||
|
|
||
| // save peer info into ndb | ||
|
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| info := strings.Split(remoteFullAddr, "/") | ||
| peer := db.Peer{ | ||
| ID: info[len(info)-1], | ||
| Address: remoteFullAddr, | ||
| Status: "connected", | ||
| LastConnected: time.Now(), | ||
| } | ||
| if err := n.ndb.AddPeer(peer); err != nil { | ||
| log.Printf("Failed to add peer to database: %s", err) | ||
| } | ||
|
|
||
| } | ||
|
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||
| func (n *Node) sendMessage(peerID peer.ID, message string) error { | ||
| s, err := n.Host.NewStream(n.Ctx, peerID, protocol.ID(protocolID)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer s.Close() | ||
|
|
||
| _, err = s.Write([]byte(message)) | ||
| return err | ||
| } | ||
|
|
||
| func (n *Node) connectToPeer(peerAddr string) { | ||
| maddr, err := multiaddr.NewMultiaddr(peerAddr) | ||
| if err != nil { | ||
| log.Fatalf("Invalid multiaddress: %s", err) | ||
| } | ||
|
|
||
| peerinfo, err := peer.AddrInfoFromP2pAddr(maddr) | ||
| if err != nil { | ||
| log.Fatalf("Failed to get peer info: %s", err) | ||
| } | ||
|
|
||
| if err := n.Host.Connect(n.Ctx, *peerinfo); err != nil { | ||
| log.Fatalf("Failed to connect to peer: %s", err) | ||
| } | ||
|
|
||
| peer := db.Peer{ | ||
| ID: peerinfo.ID.String(), | ||
| Address: peerAddr, | ||
| Status: "connected", | ||
| LastConnected: time.Now(), | ||
| } | ||
| if err := n.ndb.AddPeer(peer); err != nil { | ||
| log.Printf("Failed to add peer to database: %s", err) | ||
| } | ||
|
|
||
| fmt.Printf("Connected to %s\n", peerinfo.ID.String()) | ||
| } | ||
|
|
||
| func (n *Node) connectPeers() { | ||
| fmt.Println("Enter the multiaddr of a peer to connect to (empty to skip):") | ||
| peerAddr, _ := bufio.NewReader(os.Stdin).ReadString('\n') | ||
| peerAddr = strings.TrimSpace(peerAddr) | ||
|
|
||
| if peerAddr != "" { | ||
| n.connectToPeer(peerAddr) | ||
|
|
||
| fmt.Println("Enter message to send (empty to skip):") | ||
| message, _ := bufio.NewReader(os.Stdin).ReadString('\n') | ||
| message = strings.TrimSpace(message) | ||
|
|
||
| if message != "" { | ||
| peerinfo, err := peer.AddrInfoFromP2pAddr(multiaddr.StringCast(peerAddr)) | ||
| if err == nil { | ||
| err = n.sendMessage(peerinfo.ID, message) | ||
| if err != nil { | ||
| fmt.Printf("Failed to send message: %s\n", err) | ||
| } else { | ||
| fmt.Println("Message sent successfully") | ||
| } | ||
| } else { | ||
| fmt.Printf("Failed to get peer info: %s\n", err) | ||
| } | ||
| } | ||
| } | ||
| } |