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authorHerbert Xu <herbert@gondor.apana.org.au>2006-03-28 01:12:13 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-03-28 17:02:46 -0800
commitd2acc3479cbccd5cfbca6c787be713ef1de12ec6 (patch)
treeaa348e19e15027db9abdd2da175a0c9055047858 /net/ipv6/Kconfig
parentf0088a50e7c49d1ba285c88fe06345f223652fd3 (diff)
[INET]: Introduce tunnel4/tunnel6
Basically this patch moves the generic tunnel protocol stuff out of xfrm4_tunnel/xfrm6_tunnel and moves it into the new files of tunnel4.c and tunnel6 respectively. The reason for this is that the problem that Hugo uncovered is only the tip of the iceberg. The real problem is that when we removed the dependency of ipip on xfrm4_tunnel we didn't really consider the module case at all. For instance, as it is it's possible to build both ipip and xfrm4_tunnel as modules and if the latter is loaded then ipip simply won't load. After considering the alternatives I've decided that the best way out of this is to restore the dependency of ipip on the non-xfrm-specific part of xfrm4_tunnel. This is acceptable IMHO because the intention of the removal was really to be able to use ipip without the xfrm subsystem. This is still preserved by this patch. So now both ipip/xfrm4_tunnel depend on the new tunnel4.c which handles the arbitration between the two. The order of processing is determined by a simple integer which ensures that ipip gets processed before xfrm4_tunnel. The situation for ICMP handling is a little bit more complicated since we may not have enough information to determine who it's for. It's not a big deal at the moment since the xfrm ICMP handlers are basically no-ops. In future we can deal with this when we look at ICMP caching in general. The user-visible change to this is the removal of the TUNNEL Kconfig prompts. This makes sense because it can only be used through IPCOMP as it stands. The addition of the new modules shouldn't introduce any problems since module dependency will cause them to be loaded. Oh and I also turned some unnecessary pskb's in IPv6 related to this patch to skb's. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/Kconfig')
-rw-r--r--net/ipv6/Kconfig19
1 files changed, 9 insertions, 10 deletions
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index e6f83b6a2b76..f8a107ab5592 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -88,7 +88,7 @@ config INET6_IPCOMP
tristate "IPv6: IPComp transformation"
depends on IPV6
select XFRM
- select INET6_TUNNEL
+ select INET6_XFRM_TUNNEL
select CRYPTO
select CRYPTO_DEFLATE
---help---
@@ -97,19 +97,18 @@ config INET6_IPCOMP
If unsure, say Y.
+config INET6_XFRM_TUNNEL
+ tristate
+ select INET6_TUNNEL
+ default n
+
config INET6_TUNNEL
- tristate "IPv6: tunnel transformation"
- depends on IPV6
- select XFRM
- ---help---
- Support for generic IPv6-in-IPv6 tunnel transformation, which is
- required by the IPv6-in-IPv6 tunneling module as well as tunnel mode
- IPComp.
-
- If unsure, say Y.
+ tristate
+ default n
config IPV6_TUNNEL
tristate "IPv6: IPv6-in-IPv6 tunnel"
+ select INET6_TUNNEL
depends on IPV6
---help---
Support for IPv6-in-IPv6 tunnels described in RFC 2473.