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ipv4: netfilter: Unmask upper DSCP bits in ip_route_me_harder()

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Unmask the upper DSCP bits when calling ip_route_output_key() so that in
the future it could perform the FIB lookup according to the full DSCP
value.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2024-09-05 19:51:36 +03:00 committed by David S. Miller
parent c2b639f9f3
commit 4f0880766a
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/netfilter.c
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@ -14,6 +14,7 @@
#include <net/route.h>
#include <net/xfrm.h>
#include <net/ip.h>
#include <net/inet_dscp.h>
#include <net/netfilter/nf_queue.h>
/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
@ -43,7 +44,7 @@ int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, un
*/
fl4.daddr = iph->daddr;
fl4.saddr = saddr;
fl4.flowi4_tos = RT_TOS(iph->tos);
fl4.flowi4_tos = iph->tos & INET_DSCP_MASK;
fl4.flowi4_oif = sk ? sk->sk_bound_dev_if : 0;
fl4.flowi4_l3mdev = l3mdev_master_ifindex(dev);
fl4.flowi4_mark = skb->mark;