NetBSD/sys/netinet6
dyoung 72f0a6dfb0 Eliminate address family-specific route caches (struct route, struct
route_in6, struct route_iso), replacing all caches with a struct
route.

The principle benefit of this change is that all of the protocol
families can benefit from route cache-invalidation, which is
necessary for correct routing.  Route-cache invalidation fixes an
ancient PR, kern/3508, at long last; it fixes various other PRs,
also.

Discussions with and ideas from Joerg Sonnenberger influenced this
work tremendously.  Of course, all design oversights and bugs are
mine.

DETAILS

1 I added to each address family a pool of sockaddrs.  I have
  introduced routines for allocating, copying, and duplicating,
  and freeing sockaddrs:

        struct sockaddr *sockaddr_alloc(sa_family_t af, int flags);
        struct sockaddr *sockaddr_copy(struct sockaddr *dst,
                                       const struct sockaddr *src);
        struct sockaddr *sockaddr_dup(const struct sockaddr *src, int flags);
        void sockaddr_free(struct sockaddr *sa);

  sockaddr_alloc() returns either a sockaddr from the pool belonging
  to the specified family, or NULL if the pool is exhausted.  The
  returned sockaddr has the right size for that family; sa_family
  and sa_len fields are initialized to the family and sockaddr
  length---e.g., sa_family = AF_INET and sa_len = sizeof(struct
  sockaddr_in).  sockaddr_free() puts the given sockaddr back into
  its family's pool.

  sockaddr_dup() and sockaddr_copy() work analogously to strdup()
  and strcpy(), respectively.  sockaddr_copy() KASSERTs that the
  family of the destination and source sockaddrs are alike.

  The 'flags' argumet for sockaddr_alloc() and sockaddr_dup() is
  passed directly to pool_get(9).

2 I added routines for initializing sockaddrs in each address
  family, sockaddr_in_init(), sockaddr_in6_init(), sockaddr_iso_init(),
  etc.  They are fairly self-explanatory.

3 structs route_in6 and route_iso are no more.  All protocol families
  use struct route.  I have changed the route cache, 'struct route',
  so that it does not contain storage space for a sockaddr.  Instead,
  struct route points to a sockaddr coming from the pool the sockaddr
  belongs to.  I added a new method to struct route, rtcache_setdst(),
  for setting the cache destination:

        int rtcache_setdst(struct route *, const struct sockaddr *);

  rtcache_setdst() returns 0 on success, or ENOMEM if no memory is
  available to create the sockaddr storage.

  It is now possible for rtcache_getdst() to return NULL if, say,
  rtcache_setdst() failed.  I check the return value for NULL
  everywhere in the kernel.

4 Each routing domain (struct domain) has a list of live route
  caches, dom_rtcache.  rtflushall(sa_family_t af) looks up the
  domain indicated by 'af', walks the domain's list of route caches
  and invalidates each one.
2007-05-02 20:40:22 +00:00
..
ah_aesxcbcmac.c merge ktrace-lwp. 2005-12-11 12:16:03 +00:00
ah_aesxcbcmac.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00
ah_core.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
ah_input.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
ah_output.c fix spelling of accommodate; from Zapher. 2006-11-24 19:46:58 +00:00
ah.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
dest6.c __unused removal on arguments; approved by core. 2006-11-16 01:32:37 +00:00
esp_aesctr.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
esp_aesctr.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00
esp_core.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
esp_input.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
esp_output.c fix spelling of accommodate; from Zapher. 2006-11-24 19:46:58 +00:00
esp_rijndael.c __unused removal on arguments; approved by core. 2006-11-16 01:32:37 +00:00
esp_rijndael.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00
esp.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
files.ipsec Merge kernel and userland rmd160 and sha2 implementation. 2006-10-27 21:20:48 +00:00
files.netinet6 Add IPv6 Fast Forward - the IPv4 counterpart: 2007-03-07 22:20:04 +00:00
frag6.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
icmp6.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_cksum.c PR 32653: mrt@notwork.org: remove 'sum += w[0]' left in previous revision. 2006-01-27 20:08:11 +00:00
in6_gif.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_gif.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
in6_ifattach.c Bark if we cannot assign a link-local address. While I am here, 2007-03-15 23:26:04 +00:00
in6_ifattach.h NDP-related improvements: 2006-03-05 23:47:08 +00:00
in6_offload.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_offload.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_pcb.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_pcb.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_proto.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_src.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
in6_var.h Add IPv6 Fast Forward - the IPv4 counterpart: 2007-03-07 22:20:04 +00:00
in6.c KNF: compare pointer w/ NULL, don't "check truth". Fix K&R parameter 2007-03-15 23:22:30 +00:00
in6.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6_etherip.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6_etherip.h New EtherIP driver based on tap(4) and gif(4) by Hans Rosenfeld. 2006-11-23 04:07:07 +00:00
ip6_flow.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6_forward.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6_id.c Fix initializers. 2006-08-30 17:11:53 +00:00
ip6_input.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6_mroute.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6_mroute.h Remove unused member 'm6_route' from struct mif6. 2007-04-25 01:12:46 +00:00
ip6_output.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6_var.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ip6protosw.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
ipcomp_core.c __unused removal on arguments; approved by core. 2006-11-16 01:32:37 +00:00
ipcomp_input.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
ipcomp_output.c fix spelling of accommodate; from Zapher. 2006-11-24 19:46:58 +00:00
ipcomp.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00
ipsec.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
ipsec.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
Makefile
mld6_var.h NDP-related improvements: 2006-03-05 23:47:08 +00:00
mld6.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
nd6_nbr.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
nd6_rtr.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
nd6.c Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
nd6.h Eliminate address family-specific route caches (struct route, struct 2007-05-02 20:40:22 +00:00
pim6_var.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00
pim6.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00
raw_ip6.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
raw_ip6.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00
route6.c Disable processing of routing header type 0 packets since they can be used 2007-04-22 19:47:41 +00:00
scope6_var.h Better support of IPv6 scoped addresses. 2006-01-21 00:15:35 +00:00
scope6.c comment out impossible comparison. 2006-09-03 05:16:59 +00:00
udp6_output.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
udp6_usrreq.c Kill caddr_t; there will be some MI fallout, but it will be fixed shortly. 2007-03-04 05:59:00 +00:00
udp6_var.h KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 2007-02-17 22:34:07 +00:00
udp6.h Multiple inclusion protection, as suggested by christos@ on tech-kern@ 2005-12-10 23:31:41 +00:00