diff options
| author | paul <paul> | 2004-09-27 12:46:37 +0000 |
|---|---|---|
| committer | paul <paul> | 2004-09-27 12:46:37 +0000 |
| commit | 9172ee0e5dc8c6f6929821fb1433699700e53114 (patch) | |
| tree | 63c8f3d3c3c375fe9613217e8e22213a7e10bf42 | |
| parent | ddb07e5bf4e16889b0845c83d8a73ebfa435bcba (diff) | |
2004-09-27 Paul Jakma <paul@dishone.st>
* zebra.h: Add WANT_OSPF_WRITE_FRAGMENT for ospfd
to try to fragment oversized packets. Enabled only for Linux.
Add HAVE_IP_HDRINCL_BSD_ORDER to define struct ip byte order,
to consolidate various ad-hoc platform defines for same thing.
| -rw-r--r-- | lib/ChangeLog | 7 | ||||
| -rw-r--r-- | lib/zebra.h | 36 |
2 files changed, 43 insertions, 0 deletions
diff --git a/lib/ChangeLog b/lib/ChangeLog index 0dee53b5..05ad4db5 100644 --- a/lib/ChangeLog +++ b/lib/ChangeLog @@ -1,3 +1,10 @@ +2004-09-27 Paul Jakma <paul@dishone.st> + + * zebra.h: Add WANT_OSPF_WRITE_FRAGMENT for ospfd + to try to fragment oversized packets. Enabled only for Linux. + Add HAVE_IP_HDRINCL_BSD_ORDER to define struct ip byte order, + to consolidate various ad-hoc platform defines for same thing. + 2004-09-26 Hasso Tepper <hasso at quagga.net> * vty.c, sockopt.c: Fix compiler warnings. diff --git a/lib/zebra.h b/lib/zebra.h index 6412655c..e53a40c5 100644 --- a/lib/zebra.h +++ b/lib/zebra.h @@ -245,6 +245,42 @@ struct in_pktinfo }; #endif +/* + * OSPF Fragmentation / fragmented writes + * + * ospfd can support writing fragmented packets, for cases where + * kernel will not fragment IP_HDRINCL and/or multicast destined + * packets (ie TTBOMK all kernels, BSD, SunOS, Linux). However, + * SunOS, probably BSD too, clobber the user supplied IP ID and IP + * flags fields, hence user-space fragmentation will not work. + * Only Linux is known to leave IP header unmolested. + * Further, fragmentation really should be done the kernel, which already + * supports it, and which avoids nasty IP ID state problems. + * + * Fragmentation of OSPF packets can be required on networks with router + * with many many interfaces active in one area, or on networks with links + * with low MTUs. + */ +#ifdef GNU_LINUX +#define WANT_OSPF_WRITE_FRAGMENT +#endif + +/* + * IP_HDRINCL / struct ip byte order + * + * Linux: network byte order + * *BSD: network, except for length and offset. (cf Stevens) + * SunOS: nominally as per BSD. but bug: network order on LE. + * OpenBSD: network byte order, apart from older versions which are as per + * *BSD + */ +#if defined(__NetBSD__) || defined(__FreeBSD__) \ + || (defined(__OpenBSD__) && (OpenBSD < 200311)) \ + || (defined(SUNOS_5) && defined(WORDS_BIGENDIAN)) +#define HAVE_IP_HDRINCL_BSD_ORDER +#endif + +/* /* MAX / MIN are not commonly defined, but useful */ #ifndef MAX #define MAX(a, b) ((a) > (b) ? (a) : (b)) |