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package p2p
import (
"math/rand"
"net"
crypto "github.com/tendermint/go-crypto"
cmn "github.com/tendermint/tmlibs/common"
"github.com/tendermint/tmlibs/log"
cfg "github.com/tendermint/tendermint/config"
"github.com/tendermint/tendermint/p2p/conn"
)
func AddPeerToSwitch(sw *Switch, peer Peer) {
sw.peers.Add(peer)
}
func CreateRandomPeer(outbound bool) *peer {
addr, netAddr := CreateRoutableAddr()
p := &peer{
peerConn: peerConn{
outbound: outbound,
},
nodeInfo: NodeInfo{
ListenAddr: netAddr.DialString(),
PubKey: crypto.GenPrivKeyEd25519().Wrap().PubKey(),
},
mconn: &conn.MConnection{},
}
p.SetLogger(log.TestingLogger().With("peer", addr))
return p
}
func CreateRoutableAddr() (addr string, netAddr *NetAddress) {
for {
var err error
addr = cmn.Fmt("%X@%v.%v.%v.%v:46656", cmn.RandBytes(20), rand.Int()%256, rand.Int()%256, rand.Int()%256, rand.Int()%256)
netAddr, err = NewNetAddressString(addr)
if err != nil {
panic(err)
}
if netAddr.Routable() {
break
}
}
return
}
//------------------------------------------------------------------
// Connects switches via arbitrary net.Conn. Used for testing.
// MakeConnectedSwitches returns n switches, connected according to the connect func.
// If connect==Connect2Switches, the switches will be fully connected.
// initSwitch defines how the i'th switch should be initialized (ie. with what reactors).
// NOTE: panics if any switch fails to start.
func MakeConnectedSwitches(cfg *cfg.P2PConfig, n int, initSwitch func(int, *Switch) *Switch, connect func([]*Switch, int, int)) []*Switch {
switches := make([]*Switch, n)
for i := 0; i < n; i++ {
switches[i] = MakeSwitch(cfg, i, "testing", "123.123.123", initSwitch)
}
if err := StartSwitches(switches); err != nil {
panic(err)
}
for i := 0; i < n; i++ {
for j := i + 1; j < n; j++ {
connect(switches, i, j)
}
}
return switches
}
// Connect2Switches will connect switches i and j via net.Pipe().
// Blocks until a connection is established.
// NOTE: caller ensures i and j are within bounds.
func Connect2Switches(switches []*Switch, i, j int) {
switchI := switches[i]
switchJ := switches[j]
c1, c2 := conn.NetPipe()
doneCh := make(chan struct{})
go func() {
err := switchI.addPeerWithConnection(c1)
if err != nil {
panic(err)
}
doneCh <- struct{}{}
}()
go func() {
err := switchJ.addPeerWithConnection(c2)
if err != nil {
panic(err)
}
doneCh <- struct{}{}
}()
<-doneCh
<-doneCh
}
func (sw *Switch) addPeerWithConnection(conn net.Conn) error {
pc, err := newInboundPeerConn(conn, sw.peerConfig, sw.nodeKey.PrivKey)
if err != nil {
if err := conn.Close(); err != nil {
sw.Logger.Error("Error closing connection", "err", err)
}
return err
}
if err = sw.addPeer(pc); err != nil {
pc.CloseConn()
return err
}
return nil
}
// StartSwitches calls sw.Start() for each given switch.
// It returns the first encountered error.
func StartSwitches(switches []*Switch) error {
for _, s := range switches {
err := s.Start() // start switch and reactors
if err != nil {
return err
}
}
return nil
}
func MakeSwitch(cfg *cfg.P2PConfig, i int, network, version string, initSwitch func(int, *Switch) *Switch) *Switch {
// new switch, add reactors
// TODO: let the config be passed in?
nodeKey := &NodeKey{
PrivKey: crypto.GenPrivKeyEd25519().Wrap(),
}
sw := NewSwitch(cfg)
sw.SetLogger(log.TestingLogger())
sw = initSwitch(i, sw)
ni := NodeInfo{
PubKey: nodeKey.PubKey(),
Moniker: cmn.Fmt("switch%d", i),
Network: network,
Version: version,
ListenAddr: cmn.Fmt("%v:%v", network, rand.Intn(64512)+1023),
}
for ch := range sw.reactorsByCh {
ni.Channels = append(ni.Channels, ch)
}
sw.SetNodeInfo(ni)
sw.SetNodeKey(nodeKey)
return sw
}