// Address specific
func handleAddr(update netlink.AddrUpdate, callback func(supervisor.NetlinkUpdate)) {
if update.NewAddr {
fmt.Printf("[Add a address]")
} else {
fmt.Printf("[Delete a address]")
}
if update.LinkAddress.IP.To4() != nil {
fmt.Printf("[IPv4]\t%+v\n", update)
} else {
// We would not like to handle IPv6 at present.
fmt.Printf("[IPv6]\t%+v\n", update)
return
}
netlinkUpdate := supervisor.NetlinkUpdate{}
netlinkUpdate.Addr = update
netlinkUpdate.UpdateType = supervisor.UpdateTypeAddr
links, err := netlink.LinkList()
if err != nil {
glog.Error(err)
}
for _, link := range links {
if link.Attrs().Index == update.LinkIndex && link.Type() == "veth" {
netlinkUpdate.Veth = link.(*netlink.Veth)
break
}
}
callback(netlinkUpdate)
}
// Route specific
func handleRoute(update netlink.RouteUpdate, callback func(supervisor.NetlinkUpdate)) {
// Route type is not a bit mask for a couple of values, but a single
// unsigned int, that's why we use switch here not the "&" operator.
switch update.Type {
case syscall.RTM_NEWROUTE:
fmt.Printf("[Create a route]\t%+v\n", update)
case syscall.RTM_DELROUTE:
fmt.Printf("[Remove a route]\t%+v\n", update)
case syscall.RTM_GETROUTE:
fmt.Printf("[Receive info of a route]\t%+v\n", update)
}
netlinkUpdate := supervisor.NetlinkUpdate{}
netlinkUpdate.Route = update
netlinkUpdate.UpdateType = supervisor.UpdateTypeRoute
callback(netlinkUpdate)
}
// Link specific
func handleLink(update netlink.LinkUpdate, callback func(supervisor.NetlinkUpdate)) {
if update.IfInfomsg.Flags&syscall.IFF_UP == 1 {
fmt.Printf("[Link device up]\tupdateLink is:%+v, flag is:0x%x\n", update.Link.Attrs(), update.IfInfomsg.Flags)
} else {
if update.Link.Attrs().ParentIndex == 0 {
fmt.Printf("[Link device !up][Deleted]\tupdateLink is:%+v, flag is:0x%x\n", update.Link.Attrs(), update.IfInfomsg.Flags)
} else {
fmt.Printf("[Link device !up]\tupdateLink is:%+v, flag is:0x%x\n", update.Link.Attrs(), update.IfInfomsg.Flags)
}
}
netlinkUpdate := supervisor.NetlinkUpdate{}
netlinkUpdate.UpdateType = supervisor.UpdateTypeLink
// We would like to only handle the veth pair link at present.
if veth, ok := (update.Link).(*netlink.Veth); ok {
netlinkUpdate.Veth = veth
callback(netlinkUpdate)
}
}