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net: Fix routing tables with id > 255 for legacy software

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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>
This commit is contained in:
Krzysztof Piotr Oledzki 2008-06-10 15:44:49 -07:00 • committed by David S. Miller
parent 99c6f60e72
commit 709772e6e0
2 changed files with 5 additions and 1 deletions
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1
include/linux/rtnetlink.h
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@ -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,