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authorFlorian Westphal <fw@strlen.de>2018-03-16 17:39:29 +0100
committerFlorian Westphal <fw@strlen.de>2018-03-17 00:06:25 +0100
commit9642a79381793daedc1d58b3ac4c3c61a2ec38f1 (patch)
tree43ff83214e0fe1ef6c8004c6073022f0c486d82d /include/linux/netfilter
parentca7253263a0158cafd609d924809232b562131b2 (diff)
src: fix routing header support
We can't use nft_exthdr_op to encode routing header, it breaks ipv6 extension header support. When encountering RT header, userspace did now set a new ipv6 exthdr mode, but old kernel doesn't know about this, so this failed with -EOPNOTSUPP. Revert that part and use NFT_EXTHDR_OP_IPV6. When decoding a routing extension header, try the various route types until we find a match. Note this patch isn't complete: 'srh tag 127' creates following expressions: [ exthdr load 2b @ 43 + 6 => reg 1 ] [ cmp eq reg 1 0x00007f00 ] It should instead insert a dependency test ("rt type 4"): [ exthdr load 1b @ 43 + 2 => reg 1 ] [ cmp eq reg 1 0x00000004 ] [ exthdr load 2b @ 43 + 6 => reg 1 ] [ cmp eq reg 1 0x00007e00 ] nft should then use this to infer the routing header type. While add it, document the srh option. Fixes: 1400288f6d39d ("src: handle rt0 and rt2 properly") Reported-by: Phil Sutter <phil@nwl.cc> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Ahmed Abdelsalam <amsalam20@gmail.com>
Diffstat (limited to 'include/linux/netfilter')
-rw-r--r--include/linux/netfilter/nf_tables.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/include/linux/netfilter/nf_tables.h b/include/linux/netfilter/nf_tables.h
index 1a98f03a..517a39a0 100644
--- a/include/linux/netfilter/nf_tables.h
+++ b/include/linux/netfilter/nf_tables.h
@@ -731,9 +731,6 @@ enum nft_exthdr_flags {
enum nft_exthdr_op {
NFT_EXTHDR_OP_IPV6,
NFT_EXTHDR_OP_TCPOPT,
- NFT_EXTHDR_OP_RT0,
- NFT_EXTHDR_OP_RT2,
- NFT_EXTHDR_OP_RT4,
__NFT_EXTHDR_OP_MAX
};
#define NFT_EXTHDR_OP_MAX (__NFT_EXTHDR_OP_MAX - 1)