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netfilter: conntrack: dccp: try not to drop skb in conntrack

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It would be better not to drop skb in conntrack unless we have good
alternatives. So we can treat the result of testing skb's header
pointer as nf_conntrack_tcp_packet() does.

Signed-off-by: Jason Xing <kernelxing@tencent.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jason Xing 2024-03-25 10:59:38 +08:00 committed by Pablo Neira Ayuso
parent 4a3540a8bf
commit 40616789ec
1 changed files with 2 additions and 2 deletions
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4
net/netfilter/nf_conntrack_proto_dccp.c
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@ -525,7 +525,7 @@ int nf_conntrack_dccp_packet(struct nf_conn *ct, struct sk_buff *skb,
dh = skb_header_pointer(skb, dataoff, sizeof(*dh), &_dh.dh);
if (!dh)
return NF_DROP;
return -NF_ACCEPT;
if (dccp_error(dh, skb, dataoff, state))
return -NF_ACCEPT;
@ -533,7 +533,7 @@ int nf_conntrack_dccp_packet(struct nf_conn *ct, struct sk_buff *skb,
/* pull again, including possible 48 bit sequences and subtype header */
dh = dccp_header_pointer(skb, dataoff, dh, &_dh);
if (!dh)
return NF_DROP;
return -NF_ACCEPT;
type = dh->dccph_type;
if (!nf_ct_is_confirmed(ct) && !dccp_new(ct, skb, dh, state))