You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
2.6 KiB
125 lines
2.6 KiB
package peer
|
|
|
|
import (
|
|
"sync/atomic"
|
|
"net"
|
|
)
|
|
|
|
const (
|
|
DEFAULT_PORT = 8001
|
|
)
|
|
|
|
/* Listener */
|
|
|
|
type Listener interface {
|
|
Connections() <-chan *Connection
|
|
LocalAddress() *NetAddress
|
|
Stop()
|
|
}
|
|
|
|
|
|
/* DefaultListener */
|
|
|
|
type DefaultListener struct {
|
|
listener net.Listener
|
|
connections chan *Connection
|
|
stopped uint32
|
|
}
|
|
|
|
const (
|
|
DEFAULT_BUFFERED_CONNECTIONS = 10
|
|
)
|
|
|
|
func NewDefaultListener(protocol string, listenAddr string) Listener {
|
|
listener, err := net.Listen(protocol, listenAddr)
|
|
if err != nil { panic(err) }
|
|
|
|
dl := &DefaultListener{
|
|
listener: listener,
|
|
connections: make(chan *Connection, DEFAULT_BUFFERED_CONNECTIONS),
|
|
}
|
|
|
|
go dl.listenHandler()
|
|
|
|
return dl
|
|
}
|
|
|
|
func (l *DefaultListener) listenHandler() {
|
|
for {
|
|
conn, err := l.listener.Accept()
|
|
|
|
if atomic.LoadUint32(&l.stopped) == 1 { return }
|
|
|
|
// listener wasn't stopped,
|
|
// yet we encountered an error.
|
|
if err != nil { panic(err) }
|
|
|
|
c := NewConnection(conn)
|
|
l.connections <- c
|
|
}
|
|
|
|
// cleanup
|
|
close(l.connections)
|
|
for _ = range l.connections {
|
|
// drain
|
|
}
|
|
}
|
|
|
|
func (l *DefaultListener) Connections() <-chan *Connection {
|
|
return l.connections
|
|
}
|
|
|
|
func (l *DefaultListener) LocalAddress() *NetAddress {
|
|
return GetLocalAddress()
|
|
}
|
|
|
|
func (l *DefaultListener) Stop() {
|
|
if atomic.CompareAndSwapUint32(&l.stopped, 0, 1) {
|
|
l.listener.Close()
|
|
}
|
|
}
|
|
|
|
|
|
/* local address helpers */
|
|
|
|
func GetLocalAddress() *NetAddress {
|
|
laddr := GetUPNPLocalAddress()
|
|
if laddr != nil { return laddr }
|
|
|
|
laddr = GetDefaultLocalAddress()
|
|
if laddr != nil { return laddr }
|
|
|
|
panic("Could not determine local address")
|
|
}
|
|
|
|
// UPNP external address discovery & port mapping
|
|
// TODO: more flexible internal & external ports
|
|
func GetUPNPLocalAddress() *NetAddress {
|
|
nat, err := Discover()
|
|
if err != nil { return nil }
|
|
|
|
ext, err := nat.GetExternalAddress()
|
|
if err != nil { return nil }
|
|
|
|
_, err := nat.AddPortMapping("tcp", DEFAULT_PORT, DEFAULT_PORT, "tendermint", 0)
|
|
if err != nil { return nil }
|
|
|
|
return NewNetAddressIPPort(ext, DEFAULT_PORT)
|
|
}
|
|
|
|
// Naive local IPv4 interface address detection
|
|
// TODO: use syscalls to get actual ourIP. http://pastebin.com/9exZG4rh
|
|
func GetDefaultLocalAddress() *NetAddress {
|
|
addrs, err := net.InterfaceAddrs()
|
|
if err != nil { panic("Wtf") }
|
|
for _, a := range addrs {
|
|
ipnet, ok := a.(*net.IPNet)
|
|
if !ok { continue }
|
|
v4 := ipnet.IP.To4()
|
|
if v4 == nil || v4[0] == 127 { continue } // loopback
|
|
return NewNetAddress(a)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
|