netfilter: nf_dup4: Unmask upper DSCP bits in nf_dup_ipv4_route()
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>
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@ -15,6 +15,7 @@
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#include <net/icmp.h>
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#include <net/ip.h>
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#include <net/route.h>
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#include <net/inet_dscp.h>
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#include <net/netfilter/ipv4/nf_dup_ipv4.h>
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#if IS_ENABLED(CONFIG_NF_CONNTRACK)
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#include <net/netfilter/nf_conntrack.h>
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@ -32,7 +33,7 @@ static bool nf_dup_ipv4_route(struct net *net, struct sk_buff *skb,
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fl4.flowi4_oif = oif;
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fl4.daddr = gw->s_addr;
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fl4.flowi4_tos = RT_TOS(iph->tos);
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fl4.flowi4_tos = iph->tos & INET_DSCP_MASK;
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fl4.flowi4_scope = RT_SCOPE_UNIVERSE;
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fl4.flowi4_flags = FLOWI_FLAG_KNOWN_NH;
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rt = ip_route_output_key(net, &fl4);
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