func (iml *IPMacLearner) learner() {
for {
pair := C.pcapRead(iml.handle)
if pair == nil {
if iml.closed {
return
}
continue
}
mac := C.GoString(pair.mac)
var ip, ip6 string
if pair.ip != nil {
ip = C.GoString(pair.ip)
}
if pair.ip6 != nil {
ip6 = C.GoString(pair.ip6)
}
log.Debug("got mac/ip pair:", mac, ip, ip6)
iml.lock.Lock()
// skip macs we aren't tracking
if _, ok := iml.pairs[mac]; !ok {
iml.lock.Unlock()
continue
}
// TODO: Need to send from goroutine?
iml.pairs[mac] <- IP{ip, ip6}
iml.lock.Unlock()
}
}
func (iml *IPMacLearner) learner() {
for {
pair := C.pcapRead(iml.handle)
if pair == nil {
if iml.closed {
return
}
continue
}
mac := C.GoString(pair.mac)
var ip, ip6 string
if pair.ip != nil {
ip = C.GoString(pair.ip)
}
if pair.ip6 != nil {
ip6 = C.GoString(pair.ip6)
}
log.Debug("got mac/ip pair:", mac, ip, ip6)
iml.lock.Lock()
// skip macs we aren't tracking
if _, ok := iml.pairs[mac]; !ok {
iml.lock.Unlock()
continue
}
if ip != "" {
iml.pairs[mac].IP4 = ip
} else if ip6 != "" {
if iml.pairs[mac].IP6 != "" && strings.HasPrefix(ip6, "fe80") {
log.Debugln("ignoring link-local over existing IPv6 address")
} else {
iml.pairs[mac].IP6 = ip6
}
}
iml.lock.Unlock()
}
}