func (manager *LinkManager) addrReceived(msg *netlink.Message) {
rtmsg, _ := addr.ParseMessage(*msg)
hdr, _ := rtmsg.Header.(*addr.Header)
interfaceIndex := hdr.InterfaceIndex()
ipAddrAttr, err := rtmsg.GetAttribute(addr.IFA_ADDRESS)
if err != nil {
log.Printf("Can't get IP address attribute: %v", err)
return
}
link := manager.links[interfaceIndex]
if link == nil {
log.Printf("Received IP address for unknown interface index %d", interfaceIndex)
return
}
ip := convertNlAddrToIp(&ipAddrAttr)
log.Printf("Received new address for index %d: %v", interfaceIndex, ip.String())
firstAddress := len(link.addresses) == 0
link.addresses = append(link.addresses, &ip)
if firstAddress {
log.Printf("Received first address, interface should now be ready to be used")
env := manager.createEmitEnv(link)
upstartController.Emit("net-device-up", env, false)
}
}
func (manager *LinkManager) addressRemoved(msg *netlink.Message) {
rtmsg, err := addr.ParseMessage(*msg)
if err != nil {
log.Printf("Can't parse addr message")
}
hdr, _ := rtmsg.Header.(*addr.Header)
ipAddrAttr, err := rtmsg.GetAttribute(addr.IFA_ADDRESS)
delIp := convertNlAddrToIp(&ipAddrAttr)
link := manager.links[hdr.InterfaceIndex()]
log.Printf("Removing address %s from interface %d", delIp.String(), hdr.InterfaceIndex())
var i int = -1
for i = range link.addresses {
ip := link.addresses[i]
if delIp.Equal(*ip) {
break
}
}
if i > -1 {
link.addresses = append(link.addresses[:i], link.addresses[i+1:]...)
log.Printf("Removed one address from interface %d, %d addresses left", hdr.InterfaceIndex(), len(link.addresses))
} else {
log.Printf("ERROR: Requested to remove unknown address %s from interface %d", delIp.String(), hdr.InterfaceIndex())
}
if len(link.addresses) == 0 {
env := manager.createEmitEnv(link)
upstartController.Emit("net-device-down", env, false)
}
}