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Move top level packages to internal.

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This commit is contained in:
Jakob Borg
2014-09-22 21:42:11 +02:00
parent fbdbd722b1
commit 14817e31f6
174 changed files with 252 additions and 254 deletions
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41
internal/beacon/beacon.go Normal file
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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package beacon
import "net"
type recv struct {
data []byte
src net.Addr
}
type Interface interface {
Send(data []byte)
Recv() ([]byte, net.Addr)
}
func genericReader(conn *net.UDPConn, 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")
}
}
}
}

97
internal/beacon/broadcast.go Normal file
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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package beacon
import "net"
type Broadcast struct {
conn *net.UDPConn
port int
inbox chan []byte
outbox chan recv
}
func NewBroadcast(port int) (*Broadcast, error) {
conn, err := net.ListenUDP("udp", &net.UDPAddr{Port: port})
if err != nil {
return nil, err
}
b := &Broadcast{
conn: conn,
port: port,
inbox: make(chan []byte),
outbox: make(chan recv, 16),
}
go genericReader(b.conn, b.outbox)
go b.writer()
return b, nil
}
func (b *Broadcast) Send(data []byte) {
b.inbox <- data
}
func (b *Broadcast) Recv() ([]byte, net.Addr) {
recv := <-b.outbox
return recv.data, recv.src
}
func (b *Broadcast) writer() {
for bs := range b.inbox {
addrs, err := net.InterfaceAddrs()
if err != nil {
l.Warnln("Broadcast: interface addresses:", err)
continue
}
var dsts []net.IP
for _, addr := range addrs {
if iaddr, ok := addr.(*net.IPNet); ok && iaddr.IP.IsGlobalUnicast() && iaddr.IP.To4() != nil {
baddr := bcast(iaddr)
dsts = append(dsts, baddr.IP)
}
}
if len(dsts) == 0 {
// Fall back to the general IPv4 broadcast address
dsts = append(dsts, net.IP{0xff, 0xff, 0xff, 0xff})
}
if debug {
l.Debugln("addresses:", dsts)
}
for _, ip := range dsts {
dst := &net.UDPAddr{IP: ip, Port: b.port}
_, err := b.conn.WriteTo(bs, dst)
if err != nil {
if debug {
l.Debugln(err)
}
} else if debug {
l.Debugf("sent %d bytes to %s", len(bs), dst)
}
}
}
}
func bcast(ip *net.IPNet) *net.IPNet {
var bc = &net.IPNet{}
bc.IP = make([]byte, len(ip.IP))
copy(bc.IP, ip.IP)
bc.Mask = ip.Mask
offset := len(bc.IP) - len(bc.Mask)
for i := range bc.IP {
if i-offset >= 0 {
bc.IP[i] = ip.IP[i] | ^ip.Mask[i-offset]
}
}
return bc
}

34
internal/beacon/broadcast_test.go Normal file
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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package beacon
import (
"net"
"testing"
)
var addrToBcast = []struct {
addr, bcast string
}{
{"172.16.32.33/25", "172.16.32.127/25"},
{"172.16.32.129/25", "172.16.32.255/25"},
{"172.16.32.33/24", "172.16.32.255/24"},
{"172.16.32.33/22", "172.16.35.255/22"},
{"172.16.32.33/0", "255.255.255.255/0"},
{"172.16.32.33/32", "172.16.32.33/32"},
}
func TestBroadcastAddr(t *testing.T) {
for _, tc := range addrToBcast {
_, net, err := net.ParseCIDR(tc.addr)
if err != nil {
t.Fatal(err)
}
bc := bcast(net).String()
if bc != tc.bcast {
t.Errorf("%q != %q", bc, tc.bcast)
}
}
}

17
internal/beacon/debug.go Normal file
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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package beacon
import (
"os"
"strings"
"github.com/syncthing/syncthing/internal/logger"
)
var (
debug = strings.Contains(os.Getenv("STTRACE"), "beacon") || os.Getenv("STTRACE") == "all"
l = logger.DefaultLogger
)

6
internal/beacon/doc.go Normal file
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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// Package beacon implements an UDP broadcast beacon
package beacon

69
internal/beacon/multicast.go Normal file
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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package beacon
import "net"
type Multicast struct {
conn *net.UDPConn
addr *net.UDPAddr
inbox chan []byte
outbox chan recv
}
func NewMulticast(addr string) (*Multicast, error) {
gaddr, err := net.ResolveUDPAddr("udp", addr)
if err != nil {
return nil, err
}
conn, err := net.ListenMulticastUDP("udp", nil, gaddr)
if err != nil {
return nil, err
}
b := &Multicast{
conn: conn,
addr: gaddr,
inbox: make(chan []byte),
outbox: make(chan recv, 16),
}
go genericReader(b.conn, b.outbox)
go b.writer()
return b, nil
}
func (b *Multicast) Send(data []byte) {
b.inbox <- data
}
func (b *Multicast) Recv() ([]byte, net.Addr) {
recv := <-b.outbox
return recv.data, recv.src
}
func (b *Multicast) writer() {
for bs := range b.inbox {
intfs, err := net.Interfaces()
if err != nil {
l.Warnln("multicast interfaces:", err)
continue
}
for _, intf := range intfs {
if intf.Flags&net.FlagUp != 0 && intf.Flags&net.FlagMulticast != 0 {
addr := *b.addr
addr.Zone = intf.Name
_, err = b.conn.WriteTo(bs, &addr)
if err != nil {
if debug {
l.Debugln(err, "on write to", addr)
}
} else if debug {
l.Debugf("sent %d bytes to %s", len(bs), addr.String())
}
}
}
}
}