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authorIlia Sotnikov <hostcc@gmail.com>2006-03-25 04:38:55 -0500
committerDavid S. Miller <davem@davemloft.net>2006-03-25 04:38:55 -0500
commitcef2685e0053945ea0f3c02297386b040f486ea7 (patch)
tree869c11f64c5e2259342c228c80e93cbbbf8e4fc1 /include
parentb8059eadf9f4dc24bd72da71daa832a9a9899fb4 (diff)
[IPV4]: Aggregate route entries with different TOS values
When we get an ICMP need-to-frag message, the original TOS value in the ICMP payload cannot be used as a key to look up the routes to update. This is because the TOS field may have been modified by routers on the way. Similarly, ip_rt_redirect should also ignore the TOS as the router that gave us the message may have modified the TOS value. The patch achieves this objective by aggregating entries with different TOS values (but are otherwise identical) into the same bucket. This makes it easy to update them at the same time when an ICMP message is received. In future we should use a twin-hashing scheme where teh aggregation occurs at the entry level. That is, the TOS goes back into the hash for normal lookups while ICMP lookups will end up with a node that gives us a list that contains all other route entries that differ only by TOS. Signed-off-by: Ilia Sotnikov <hostcc@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/route.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/route.h b/include/net/route.h
index 9c04f15090d2..98c915abdec8 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -110,7 +110,7 @@ extern struct ip_rt_acct *ip_rt_acct;
110struct in_device; 110struct in_device;
111extern int ip_rt_init(void); 111extern int ip_rt_init(void);
112extern void ip_rt_redirect(u32 old_gw, u32 dst, u32 new_gw, 112extern void ip_rt_redirect(u32 old_gw, u32 dst, u32 new_gw,
113 u32 src, u8 tos, struct net_device *dev); 113 u32 src, struct net_device *dev);
114extern void ip_rt_advice(struct rtable **rp, int advice); 114extern void ip_rt_advice(struct rtable **rp, int advice);
115extern void rt_cache_flush(int how); 115extern void rt_cache_flush(int how);
116extern int __ip_route_output_key(struct rtable **, const struct flowi *flp); 116extern int __ip_route_output_key(struct rtable **, const struct flowi *flp);