Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=709772...
Commit: 709772e6e06564ed94ba740de70185ac3d792773
Parent: 99c6f60e72f112b57ddb07abb2e5f771ee211f43
Author: Krzysztof Piotr Oledzki <ole@ans.pl>
AuthorDate: Tue Jun 10 15:44:49 2008 -0700
Committer: David S. Miller <davem@davemloft.net>
CommitDate: Tue Jun 10 15:44:49 2008 -0700
net: Fix routing tables with id > 255 for legacy software
Most legacy software do not like tables > 255 as rtm_table is u8
so tb_id is sent &0xff and it is possible to mismatch for example
table 510 with table 254 (main).
This patch introduces RT_TABLE_COMPAT=252 so the code uses it if
tb_id > 255. It makes such old applications happy, new
ones are still able to use RTA_TABLE to get a proper table id.
Signed-off-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/rtnetlink.h | 1 +
net/ipv4/fib_semantics.c | 5 ++++-
2 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index a2aec2c..b358c70 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -246,6 +246,7 @@ enum rt_class_t
{
RT_TABLE_UNSPEC=0,
/* User defined values */
+ RT_TABLE_COMPAT=252,
RT_TABLE_DEFAULT=253,
RT_TABLE_MAIN=254,
RT_TABLE_LOCAL=255,
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 3b83c34..0d4d728 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -960,7 +960,10 @@ int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
rtm->rtm_dst_len = dst_len;
rtm->rtm_src_len = 0;
rtm->rtm_tos = tos;
- rtm->rtm_table = tb_id;
+ if (tb_id < 256)
+ rtm->rtm_table = tb_id;
+ else
+ rtm->rtm_table = RT_TABLE_COMPAT;
NLA_PUT_U32(skb, RTA_TABLE, tb_id);
rtm->rtm_type = type;
rtm->rtm_flags = fi->fib_flags;
--
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