logger.FatalIf(err, "Unable to get IP addresses of this host")

	for _, interf := range ifs {
		addrs, err := interf.Addrs()
		if err != nil {
			continue
		}
		if runtime.GOOS == "windows" && interf.Flags&net.FlagUp == 0 {
			continue
		}

		for _, addr := range addrs {
			var ip net.IP
			switch v := addr.(type) {
			case *net.IPNet:
				ip = v.IP
			case *net.IPAddr:
				ip = v.IP
			}

				}
			}
			if !found {
				return fmt.Errorf("unexpected address for endpoint %d: %v", i, addr)
			}
		}
	}
	return nil
}

func getLbEndpointAddrs(ep *endpointv3.LocalityLbEndpoints) []string {
	addrs := make([]string, 0)
	for _, lbEp := range ep.LbEndpoints {
		addrs = append(addrs, util.GetEndpointHost(lbEp))
	}
	return addrs

}

// FROM: http://golang.org/src/net/http/transport.go
// canonicalAddr returns url.Host but always with a ":port" suffix
func CanonicalAddr(url *url.URL) string {
	addr := url.Host
	if !hasPort(addr) {
		return addr + ":" + portMap[url.Scheme]
	}
	return addr

			ipsCp := make([]string, len(byName.addrs))
			copy(ipsCp, byName.addrs)
			return ipsCp, byName.canonicalName
		}
	}
	return nil, ""
}

// lookupStaticAddr looks up the hosts for the given address from /etc/hosts.
func lookupStaticAddr(addr string) []string {
	hosts.Lock()
	defer hosts.Unlock()
	readHosts()
	addr = parseLiteralIP(addr)
	if addr == "" {
		return nil
	}

		lastByte  byte
		primaries addrList
		fallbacks addrList
	}{
		{0, addrList{addrs[0]}, addrList{addrs[1], addrs[2]}},
		{1, addrList{addrs[0], addrs[2]}, addrList{addrs[1]}},
		{2, addrList{addrs[0], addrs[1]}, addrList{addrs[2]}},
		{3, addrList{addrs[0], addrs[1], addrs[2]}, nil},
	}
	for i, tt := range cases {
		// Inverting the function's output should not affect the outcome.
		for _, invert := range []bool{false, true} {

// described in RFC 2782.
func (addrs byPriorityWeight) shuffleByWeight() {
	sum := 0
	for _, addr := range addrs {
		sum += int(addr.Weight)
	}
	for sum > 0 && len(addrs) > 1 {
		s := 0
		n := randIntn(sum)
		for i := range addrs {
			s += int(addrs[i].Weight)
			if s > n {
				if i > 0 {
					addrs[0], addrs[i] = addrs[i], addrs[0]
				}
				break
			}
		}

	f.NetworkInterfaces = append(f.NetworkInterfaces, *intf)
	f.Address[intf.Name] = addrs
}

// InterfaceAddrs is part of NetworkInterfacer interface.
func (f *FakeNetwork) InterfaceAddrs() ([]net.Addr, error) {
	addrs := make([]net.Addr, 0)
	for _, value := range f.Address {
		addrs = append(addrs, value...)
	}
	return addrs, nil

			case ch&bss != 0:
				sym.Code = 'B'
			}
			sym.Addr += imageBase + uint64(sect.VirtualAddress)
		}
		syms = append(syms, sym)
		addrs = append(addrs, sym.Addr)
	}

	sort.Sort(uint64s(addrs))
	for i := range syms {
		j := sort.Search(len(addrs), func(x int) bool { return addrs[x] > syms[i].Addr })
		if j < len(addrs) {
			syms[i].Size = int64(addrs[j] - syms[i].Addr)
		}
	}

	return syms, nil
}

			addrs = append(addrs, v.Addr().String())
			ports = append(ports, int(v.Port()))
		}
	}
	if len(addrs) > 0 {
		return addrs, ports, nil
	}

	return nil, nil, fmt.Errorf("failed to get address for port %v", port)
}

// AddressForPort returns the externally reachable host and port of the component for the given port.
func (c *ingressImpl) AddressesForPort(port int) ([]string, []int) {

	}

	addr = tcpAddr
	return addr
}

// Addrs - returns all address information of TCP listeners.
func (listener *httpListener) Addrs() (addrs []net.Addr) {
	for i := range listener.listeners {
		addrs = append(addrs, listener.listeners[i].Addr())
	}

	return addrs
}

// TCPOptions specify customizable TCP optimizations on raw socket
type TCPOptions struct {