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host.go
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host.go
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package host
import (
"context"
"fmt"
"net"
"time"
"github.com/araskachoi/go-libp2p-pubsub-benchmark-tools/pkg/logger"
pb "github.com/araskachoi/go-libp2p-pubsub-benchmark-tools/pkg/pb/publisher"
"github.com/golang/protobuf/ptypes/empty"
ipfsaddr "github.com/ipfs/go-ipfs-addr"
peerstore "github.com/libp2p/go-libp2p-peerstore"
"google.golang.org/grpc"
)
// New returns a new grpc host
func New(props *Props) *Host {
return &Host{
props: props,
}
}
// Listen starts the grpc host
func (h *Host) Listen(ctx context.Context, addr string) error {
var lstnCfg net.ListenConfig
lis, err := lstnCfg.Listen(ctx, "tcp", addr)
if err != nil {
logger.Errorf("failed to listen: %v", err)
return err
}
defer lis.Close()
s := grpc.NewServer()
pb.RegisterPublisherServer(s, h)
if err := s.Serve(lis); err != nil {
logger.Errorf("failed to serve: %v", err)
return err
}
return nil
}
// PublishMessage implements
func (h *Host) PublishMessage(ctx context.Context, in *pb.Message) (*pb.PublishReply, error) {
logger.Info("received rpc message; will now publish to subscribers")
//spew.Dump(in)
bs, err := in.XXX_Marshal(nil, true)
if err != nil {
logger.Errorf("err marshaling message:\n%v", err)
h.props.CH <- err
return nil, err
}
if err = h.props.PS.Publish(h.props.PubsubTopic, bs); err != nil {
logger.Errorf("err publishing message:\n%v", err)
h.props.CH <- err
return nil, err
}
return &pb.PublishReply{
MsgId: in.Id,
Success: err == nil,
}, nil
}
// CloseAllPeerConnections closes all connections
// note: is this working correctly?
func (h *Host) CloseAllPeerConnections(ctx context.Context, _ *empty.Empty) (*pb.CloseAllPeerConnectionsReply, error) {
logger.Info("received close peers all connection signal on rpc")
peerIDs := h.props.Host.Network().Peers()
for _, peerID := range peerIDs {
if err := h.props.Host.Network().ClosePeer(peerID); err != nil {
logger.Errorf("err closing connection to %s\n%v", peerID, err)
h.props.CH <- err
return nil, err
}
}
return &pb.CloseAllPeerConnectionsReply{
Success: true,
}, nil
}
// ClosePeerConnections closes connections to listed peers
func (h *Host) ClosePeerConnections(ctx context.Context, peersList *pb.PeersList) (*pb.ClosePeerConnectionsReply, error) {
logger.Info("received close peers connection signal on rpc")
// TODO: ...
//var results []*pb.OpenPeerConnectionReply
for _, peer := range peersList.Peers {
addr, err := ipfsaddr.ParseString(peer)
if err != nil || addr == nil {
logger.Errorf("err parsing peer: %s\n%v", peer, err)
h.props.CH <- err
return nil, err
}
pinfo, err := peerstore.InfoFromP2pAddr(addr.Multiaddr())
if err != nil || pinfo == nil {
logger.Errorf("err getting info from peerstore\n%v", err)
h.props.CH <- err
return nil, err
}
if err = h.props.Host.Network().ClosePeer(pinfo.ID); err != nil {
logger.Errorf("err closing connection to %s\n%v", pinfo.ID, err)
h.props.CH <- err
return nil, err
}
}
return &pb.ClosePeerConnectionsReply{
Success: true,
}, nil
}
// OpenPeersConnections opens connections to listed peers
func (h *Host) OpenPeersConnections(ctx context.Context, peersList *pb.PeersList) (*pb.OpenPeersConnectionsReplies, error) {
logger.Info("received open peers connection signal on rpc")
var results []*pb.OpenPeerConnectionReply
for _, p := range peersList.Peers {
addr, err := ipfsaddr.ParseString(p)
if err != nil || addr == nil {
logger.Errorf("err parsing peer: %s\n%v", p, err)
results = append(results, &pb.OpenPeerConnectionReply{
Success: false,
Peer: p,
})
return nil, err
}
pinfo, err := peerstore.InfoFromP2pAddr(addr.Multiaddr())
if err != nil || pinfo == nil {
logger.Errorf("err getting info from peerstore\n%v", err)
results = append(results, &pb.OpenPeerConnectionReply{
Success: false,
Peer: p,
})
return nil, err
}
logger.Infof("full peer addr: %s", addr.String())
logger.Infof("peer info: %v", pinfo)
if err := h.props.Host.Connect(h.props.CTX, *pinfo); err != nil {
logger.Errorf("connecting to peer failed\n%v", err)
results = append(results, &pb.OpenPeerConnectionReply{
Success: false,
Peer: p,
})
return nil, err
}
logger.Infof("Connected to peer: %v", pinfo.ID)
results = append(results, &pb.OpenPeerConnectionReply{
Success: true,
Peer: p,
})
}
return &pb.OpenPeersConnectionsReplies{
PeerConnections: results,
}, nil
}
// ListConnectedPeers lists the host's connected peers
func (h *Host) ListConnectedPeers(ctx context.Context, _ *empty.Empty) (*pb.PeersList, error) {
logger.Info("received list connected peers signal on rpc")
var peers []string
// note: is this the correct method?
peerIDs := h.props.Host.Network().Peers()
for _, peerID := range peerIDs {
multiAddrs := h.props.Host.Peerstore().Addrs(peerID)
for _, multiAddr := range multiAddrs {
peers = append(peers, multiAddr.String())
}
}
return &pb.PeersList{
Peers: peers,
}, nil
}
// Shutdown shuts the host down
func (h *Host) Shutdown(ctx context.Context, _ *empty.Empty) (*pb.ShutdownReply, error) {
logger.Info("received shutdown signal on rpc")
if err := h.props.Host.Close(); err != nil {
logger.Errorf("err shutting down server:\n%v", err)
h.props.CH <- err
return nil, err
}
defer func() {
// note: hacky...
time.Sleep(2 * time.Second)
h.props.Shutdown <- struct{}{}
}()
return &pb.ShutdownReply{
Success: true,
}, nil
}
// ID returns the libp2p host id
func (h *Host) ID(ctx context.Context, _ *empty.Empty) (*pb.IDReply, error) {
return &pb.IDReply{
ID: fmt.Sprintf("%s", h.props.Host.ID()),
}, nil
}
// ListenAddresses returns the addresses on which the libp2p is listening
func (h *Host) ListenAddresses(ctx context.Context, _ *empty.Empty) (*pb.ListenAddressesReply, error) {
var addresses []string
multiAddrs := h.props.Host.Addrs()
for _, multiAddr := range multiAddrs {
addresses = append(addresses, multiAddr.String())
}
return &pb.ListenAddressesReply{
Addresses: addresses,
}, nil
}