1.6.12

• Populate metro and area code when performing lookups in IPv6 City databases.
  Previously this was only done when using IPv4 City databases.

1.6.11

• Fix use of a NULL pointer when opening a corrupt database with
  GeoIP_open. Reported by Stephan Zeisberg. GitHub #87.

1.6.10: Fix GeoIP_database_info truncation and Windows issues

• GeoIP_database_info now returns the full version string rather than
  incorrectly truncating it. GitHub #79.
• This API is now distributed with a small test copy of GeoIP.dat rather than
  a full copy.
• Fix issue where Visual Studio 2015 was optimizing out initialization code.
  Reported and fixed by Scott Godin. GitHub #81.
• Fix test/benchmark on Windows. Gisle Vanem. GitHub #75.

1.6.9: Fix a GeoIP_database_info regression

• Fix a regression introduced in version 1.6.8, which caused
  GeoIP_database_info to erroneously return NULL.

1.6.8: Improved thread-safety

• Allow compilation on older systems by relaxing the autoconf and automake
  minimum versions. Thank you, Jose Rubio!
• Avoid potential problems in multi-threaded environments by consistently using
  pread() rather than read().
• Fix various small issues reported by clang's static analyser.

1.6.7: Segfault Fix, More Safety Checks, Windows Fixes

• Fixed a MSVC parser stack overflow when parsing regionName.c and
  timeZone.c. Fix by elliotlo. GitHub #64.
• Updated region codes and timezones.
• When using GEOIP_MEMORY_CACHE with an invalid database file, the search
  tree traversal could attempt to read memory outside of the memory allocated
  for the memory cache, resulting in a segmentation fault. A check was added
  to ensure that the traversal code does not try to read beyond the end of the
  file, whether in memory, memory mapped, or on disk.
• Previously the return values from file reads were ignored. We now check
  these values to ensure that there were no errors.

1.6.6: Bug Fixes and Improved Windows Support

• Replaced usage of deprecated fileno, read, and lseek on Visual Studio 2005+
  with their ISO C++ conformant replacements. (Fix by ClaudiuHKS. GitHub #55.)
• A warning about using a double as a float was fixed. (Fix by ClaudiuHKS.
  GitHub #56.)
• Fixed segfault when doing a lookup on an empty database. (Fix by NesoK.
  GitHub #62.)
• Fixed a memcheck error from valgrind in the _check_mtime
  function. (Reported by yurivct. GitHub #60.)
• Fixed _check_mtime to check the return value of gettimeofday rather than
  just assuming it worked.

1.6.5: Additional data validation

• A segmentation fault in geoiplookup was fixed when the utility was passed
  an invalid database. (Reported in Red Hat bug #1180874.)
• Additional validation was added for validation of the size used in the
  creation of the index cache. (Based on discussion in Red Hat bug #832913.)
• Changed the code to only look up country codes by using functions which
  ensure that we do not try to look past the end of an array. (Reported by
  Ivan Sorokin. GitHub #53)

1.6.4: Windows and Misc. Updates

• Update Fips codes (Boris Zentner)
• Several issues with the MinGW build were fixed. (Thomas Pöchtrager. Github
  #46.)
• Use a constructor in pread.c to ensure the critical section is always
  initialized. (Thomas Pöchtrager. Github #47.)
• Added missing include of io.h on Windows. (Thomas Pöchtrager. Github #49.)
• Fixed configure warning that 'missing' script is too old or missing.
  (Reported by Floren Munteanu. Github #33.)
• Previously nmake /f Makefile.vc clean would fail on Windows. This was
  fixed.
• Obsolete win32 and NetWare make files were removed.
• Numerous documentation updates. (Reported by Thomas Pöchtrager. GitHub #48.)

1.6.3: Option to disable stderr output; bug fixes

• Added a GEOIP_SILENCE flag. Include this flag when calling GeoIP_open to
  prevent any messages from being written to stderr. ( Philip Prindeville
  and Boris Zentner )
• Mitigate a possible race condition when running under threads in the
  GeoIP_cleanup function. ( Anthon Pang )
• Added some recommendations to the docs on using this library in a
  threaded application. ( Boriz Zentner )
• Fixed some bugs discovered by coverity, including failure to check some
  system call return values and making sure all strings are
  null-terminated. ( Boris Zentner )