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authorKrzysztof Piotr Oledzki <ole@ans.pl>2008-06-10 15:44:49 -0700
committerDavid S. Miller <davem@davemloft.net>2008-06-10 15:44:49 -0700
commit709772e6e06564ed94ba740de70185ac3d792773 (patch)
tree17f94a2db1a8b47595a9440de0f7f375fae59134
parent99c6f60e72f112b57ddb07abb2e5f771ee211f43 (diff)
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>
-rw-r--r--include/linux/rtnetlink.h1
-rw-r--r--net/ipv4/fib_semantics.c5
2 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index a2aec2c0cfb..b358c704d10 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 3b83c34019f..0d4d72827e4 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;