netfilter: nf_dup4: Convert nf_dup_ipv4_route() to dscp_t.

Use ip4h_dscp() instead of reading iph->tos directly.

ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Guillaume Nault 2024-11-14 17:03:52 +01:00 committed by Pablo Neira Ayuso
parent f12b67cc7d
commit f0d839c13e

View File

@ -33,7 +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 = iph->tos & INET_DSCP_MASK;
fl4.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(iph));
fl4.flowi4_scope = RT_SCOPE_UNIVERSE;
fl4.flowi4_flags = FLOWI_FLAG_KNOWN_NH;
rt = ip_route_output_key(net, &fl4);