func MACFromIP(addr string) string {
arp.CacheUpdate()
mac := arp.Search(addr)
if mac != "" {
return mac
}
ip := net.ParseIP(addr)
if ip == nil {
return mac
}
conn, err := net.DialUDP("udp", nil, &net.UDPAddr{ip, 0, ""})
if err != nil {
return mac
}
conn.Write([]byte{0})
conn.Close()
arp.CacheUpdate()
return arp.Search(addr)
}
func Discover(discoverInterval time.Duration) (chan AC, error) {
seen := map[string]*wirelessAC{}
found := make(chan AC)
/*clientAddr, err := net.ResolveUDPAddr("udp", udpClient)
if err != nil {
log.Fatal(err)
}
l, err := net.ListenUDP("udp", clientAddr)
if err != nil {
return nil, err
}
hostAddr, err := net.ResolveUDPAddr("udp", udpHost)
if err != nil {
log.Fatal(err)
}
ping := func() error {
_, err = l.WriteToUDP([]byte("DAIKIN_UDP/common/basic_info\n"), hostAddr)
return err
}*/
arp := func() error {
// We send out a broadcast pings first...
ips, err := broadcastAddresses()
if err != nil {
return err
}
for _, ip := range ips {
//log.Printf("Broadcast pinging %s", ip)
cmd := exec.Command("ping", "-w", "5s", "-b", ip)
err := cmd.Run()
if err != nil {
log.Printf("Failed to broadcast ping %s: %s", ip, err)
}
}
for ip := range arp.Table() {
mac := arp.Search(ip)
if hemsPrefix != "" && !strings.HasPrefix(ip, hemsPrefix) {
log.Printf("skipped non-hems address: %s", ip)
continue
}
//if strings.HasPrefix(strings.ToUpper(mac), "90:B6:86") { // Murata Manufacturing Co., Ltd.
log.Printf("Found a potential daikin AC: %s (mac: %s)", ip, mac)
ac := NewWirelessAC(ip)
info, err := ac.RefreshBasicInfo()
if err == nil && info != nil && info.Ret == "OK" && info.Type == "aircon" {
if existing, ok := seen[info.Id]; ok {
existing.host = ip
} else {
seen[info.Id] = ac
found <- ac
}
}
//} else {
//log.Printf("Fail: %s %s", mac, ip)
//}
}
return nil
}
go func() {
var t *time.Timer
t = time.AfterFunc(0, func() {
//log.Printf("Searching using ARP table...")
if err := arp(); err != nil {
log.Printf("Failed to discover daikin ACs using arp table: %s", err)
}
//time.Sleep(time.Second * 5)
//log.Printf("Searching using UDP...")
//if err := ping(); err != nil {
//log.Printf("Failed to discover daikin ACs using udp: %s", err)
//}
t.Reset(discoverInterval)
})
}()
/*l.SetReadBuffer(maxDatagramSize)
go func() {
for {
b := make([]byte, maxDatagramSize)
n, src, err := l.ReadFromUDP(b)
if err != nil {
log.Printf("Daikin Discovery Error: ReadFromUDP failed: %s", err)
continue
}
//log.Printf("Received response: %s", string(b[0:n]))
info := &BasicInfo{}
mapBytes(info, b[0:n])
if existing, ok := seen[info.Id]; ok {
existing.host = src.IP.String() + ":80"
} else {
ac := NewWirelessAC(src.IP.String() + ":80")
ac.info = info
seen[info.Id] = ac
found <- ac
}
}
}()
if err := ping(); err != nil {
return nil, err
}*/
return found, nil
}
func main() {
for ip, _ := range arp.Table() {
fmt.Printf("%s : %s\n", ip, arp.Search(ip))
}
}