Shifting ints by 32 bits (bits == 0) may not give the expected result in xioparsenetwork_ip4() in xio-ip4.c:
      netmask_in->s_addr = htonl((0xffffffff << (32-bits)));
xioparsenetwork_ip6() has a similar problem (with 128).

Such out-of-range shifts are undefined and the outcome differs on different architectures.