Ensure address is always network address

Signed-off-by: Pawloland <59684145+Pawloland@users.noreply.github.com>

Author: Pawloland

libtailscale/ranges_calc/ranges_calc.go

@@ -111,6 +111,7 @@ func (s space) rangeToCIDRs(r ipRange) []netip.Prefix {
 // prefixToRange converts a netip.Prefix to an ipRange with Start and End addresses.
 // Start is the network address and End is the broadcast address.
 func (s space) prefixToRange(p netip.Prefix) ipRange {
+    p = p.Masked()
     start := s.addrToInt(p.Addr())
     hostBits := int(s.bits) - p.Bits()
     size := new(big.Int).Lsh(big.NewInt(1), uint(hostBits))