func getDialableListenAddrs(ph host.Host) ([]*net.TCPAddr, error) {
var out []*net.TCPAddr
for _, addr := range ph.Addrs() {
na, err := manet.ToNetAddr(addr)
if err != nil {
continue
}
tcp, ok := na.(*net.TCPAddr)
if ok {
out = append(out, tcp)
}
}
if len(out) == 0 {
return nil, errors.New("failed to find good external addr from peerhost")
}
return out, nil
}
