syncthing/lib/beacon/beacon.go
2015-08-23 15:14:26 +02:00

48 lines
892 B
Go

// Copyright (C) 2014 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
package beacon
import "net"
type recv struct {
data []byte
src net.Addr
}
type Interface interface {
Send(data []byte)
Recv() ([]byte, net.Addr)
}
type readerFrom interface {
ReadFrom([]byte) (int, net.Addr, error)
}
func genericReader(conn readerFrom, outbox chan<- recv) {
bs := make([]byte, 65536)
for {
n, addr, err := conn.ReadFrom(bs)
if err != nil {
l.Warnln("multicast read:", err)
return
}
if debug {
l.Debugf("recv %d bytes from %s", n, addr)
}
c := make([]byte, n)
copy(c, bs)
select {
case outbox <- recv{c, addr}:
default:
if debug {
l.Debugln("dropping message")
}
}
}
}