[PATCH] allow DSCP values in ip rulesB

[Pavel Balaev]

Hello, for now IP rules supports only old TOS values and we cannot use
DSCP.

This patch adds support for DSCP values in IP rules:

$ ip r add default via 192.168.0.6 table test
$ ip ru add tos 0x80 table test
$ ip ru
0:      from all lookup local 
32764:  from all tos CS4 lookup test 
32766:  from all lookup main 
32767:  from all lookup default 
$ ip r get fibmatch 8.8.8.9 tos 0x80
default tos CS4 via 192.168.0.6 dev lan table test

Signed-off-by: Pavel Balaev <m...@void.so>
---
 net/ipv4/fib_rules.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index f8eb78d0..7a6c5bfe 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -220,7 +220,7 @@ static int fib4_rule_configure(struct fib_rule *rule, 
struct sk_buff *skb,
        int err = -EINVAL;
        struct fib4_rule *rule4 = (struct fib4_rule *) rule;
 
-       if (frh->tos & ~IPTOS_TOS_MASK) {
+       if (frh->tos & ~(IPTOS_TOS_MASK | IPTOS_PREC_MASK)) {
                NL_SET_ERR_MSG(extack, "Invalid tos");
                goto errout;
        }
-- 
2.18.1