Thanks a lot for the positive review. Just to add a few points:

• Additional formats supported:
  • "Range" notation such as in 10.10.10.0-255 for 10.10.10/24

  • Cisco's wildcard notation

  • inet_aton and inet_ntoa to feed directly to old-style socket calls

• The code has been tested in the following platforms by the author: Solaris/Sparc, Linux/Intel, FreeBSD/Intel, Win32/Intel, Digital Unix/Alpha, HP-UX/PA-RISC, Mac OS X/PPC. No reports of endianness-related problems have been received so far.

If you're running a version earlier than 3.00, please do consider upgrading. 3.xx includes vast performance improvements in many operations as well as a simpler internal representation guaranteed to be portable to any machine with 32 bits integers.

Best regards

-lem, but some call me fokat

Update: I mistakenly mentioned 3.20 before it came into existence. Current versions as of this writing are 3.14 (production) and 3.14_1 (development, with fresh patches for IPv6).