This patch adds CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ that exposes
the u64 handshake sequence number to user-space.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
include/linux/netfilter/nfnetlink_conntrack.h | 1 +
net/netfilter/nf_conntrack_proto_dccp.c | 7 +++++++
2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/include/linux/netfilter/nfnetlink_conntrack.h b/include/linux/netfilter/nfnetlink_conntrack.h
index 1a865e4..ed4ef8d 100644
--- a/include/linux/netfilter/nfnetlink_conntrack.h
+++ b/include/linux/netfilter/nfnetlink_conntrack.h
@@ -101,6 +101,7 @@ enum ctattr_protoinfo_dccp {
CTA_PROTOINFO_DCCP_UNSPEC,
CTA_PROTOINFO_DCCP_STATE,
CTA_PROTOINFO_DCCP_ROLE,
+ CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ,
__CTA_PROTOINFO_DCCP_MAX,
};
#define CTA_PROTOINFO_DCCP_MAX (__CTA_PROTOINFO_DCCP_MAX - 1)
diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
index aee0d6b..0831b5e 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -639,6 +639,8 @@ static int dccp_to_nlattr(struct sk_buff *skb, struct nlattr *nla,
NLA_PUT_U8(skb, CTA_PROTOINFO_DCCP_STATE, ct->proto.dccp.state);
NLA_PUT_U8(skb, CTA_PROTOINFO_DCCP_ROLE,
ct->proto.dccp.role[IP_CT_DIR_ORIGINAL]);
+ NLA_PUT_U64(skb, CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ,
+ ct->proto.dccp.handshake_seq);
nla_nest_end(skb, nest_parms);
read_unlock_bh(&dccp_lock);
return 0;
@@ -651,6 +653,7 @@ nla_put_failure:
static const struct nla_policy dccp_nla_policy[CTA_PROTOINFO_DCCP_MAX + 1] = {
[CTA_PROTOINFO_DCCP_STATE] = { .type = NLA_U8 },
[CTA_PROTOINFO_DCCP_ROLE] = { .type = NLA_U8 },
+ [CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ] = { .type = NLA_U64 },
};
static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct)
@@ -683,6 +686,10 @@ static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct)
ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_SERVER;
ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_CLIENT;
}
+ if (tb[CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ]) {
+ ct->proto.dccp.handshake_seq =
+ nla_get_u64(tb[CTA_PROTOINFO_DCCP_HANDSHAKE_SEQ]);
+ }
write_unlock_bh(&dccp_lock);
return 0;
}
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