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netfilter: nf_dup4: Unmask upper DSCP bits in nf_dup_ipv4_route()

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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 19:51:38 +03:00 committed by David S. Miller
parent b7172768ab
commit 345663e6a7
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/netfilter/nf_dup_ipv4.c
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@ -15,6 +15,7 @@
#include <net/icmp.h>
#include <net/ip.h>
#include <net/route.h>
#include <net/inet_dscp.h>
#include <net/netfilter/ipv4/nf_dup_ipv4.h>
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
#include <net/netfilter/nf_conntrack.h>
@ -32,7 +33,7 @@ static bool nf_dup_ipv4_route(struct net *net, struct sk_buff *skb,
fl4.flowi4_oif = oif;
fl4.daddr = gw->s_addr;
fl4.flowi4_tos = RT_TOS(iph->tos);
fl4.flowi4_tos = iph->tos & INET_DSCP_MASK;
fl4.flowi4_scope = RT_SCOPE_UNIVERSE;
fl4.flowi4_flags = FLOWI_FLAG_KNOWN_NH;
rt = ip_route_output_key(net, &fl4);