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2008-11-16[lib] Switch Fletcher checksum back to old ospfd versionPaul Jakma
* lib/checksum.c: (fletcher_checksum) Switch the second phase of the checksum back to the old ospfd logic. The isisd-derived version: a) is very hard to follow b) had some kind of subtle bug that caused it be wrong when c0=0 and c1=254 (potentially fixable by doing the mods before adjusting x and y) Additionally: - explicitely cast expressions using non-internal variables to int, to ensure the result is signed. - defensively change the length argument to 'size_t', to ensure the code works with that argument being unsigned.. Thanks to Joakim Tjernlund for the investigative work into this bug. * tests/test-checksum.c: new file to exercise the checksum code.
2008-08-22[lib] Add fletcher checksum implementationJingjing Duan
2008-08-13 Jingjing Duan <Jingjing.Duan@sun.com> * lib/checksum.?: (fletcher_checksum) implementation of Fletcher checksum, as per RFC1008. Signed-off-by: Paul Jakma <paul@quagga.net>
2005-11-032005-11-03 Paul Jakma <paul.jakma@sun.com>paul
* zebra.h: BSD BYTE_ORDER define isn't available everywhere, define if needs be. * checksum.h: new file. checksum.c exports in_cksum, provide a header for it. * checksum.c: (in_cksum) callers shouldn't have to know it uses a u_short internally, change to void *. * Makefile.am: Add checksum.h * command.h: remove bogus trailling slash. * md5.c: (general) Update it for the twentieth century. ANSI declarations are widely supported now.. Don't include system headers, only include zebra.h. Use POSIX types (the alternative is to define u_int64_t in a portable way - rest of Quagga needs same cleanup). Make endian-conditional code be compiler conditional rather than preprocessor conditional, so that breakage gets noticed quicker. * md5.h: POSIX types. Get rid of the odd __P() non-ANSI capable compiler compatibility hack.