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netfilter: rpfilter: Convert rpfilter_mt() to dscp_t.

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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 17:03:38 +01:00 committed by Pablo Neira Ayuso
parent 6f9615a6e6
commit f694ce6de5
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/netfilter/ipt_rpfilter.c
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@ -76,7 +76,7 @@ static bool rpfilter_mt(const struct sk_buff *skb, struct xt_action_param *par)
flow.daddr = iph->saddr;
flow.saddr = rpfilter_get_saddr(iph->daddr);
flow.flowi4_mark = info->flags & XT_RPFILTER_VALID_MARK ? skb->mark : 0;
flow.flowi4_tos = iph->tos & INET_DSCP_MASK;
flow.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(iph));
flow.flowi4_scope = RT_SCOPE_UNIVERSE;
flow.flowi4_l3mdev = l3mdev_master_ifindex_rcu(xt_in(par));
flow.flowi4_uid = sock_net_uid(xt_net(par), NULL);