netfilter: nf_ct_dccp: add missing role attributes for DCCP

This patch adds missing role attribute to the DCCP type, otherwise
the creation of entries is not of any use.

The attribute added is CTA_PROTOINFO_DCCP_ROLE which contains the
role of the conntrack original tuple.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>

2 files changed, 15 insertions, 1 deletions

diff --git a/include/linux/netfilter/nfnetlink_conntrack.h b/include/linux/netfilter/nfnetlink_conntrack.h
index 29fe9ea1d346..1a865e48b8eb 100644
--- a/include/linux/netfilter/nfnetlink_conntrack.h
+++ b/include/linux/netfilter/nfnetlink_conntrack.h
@@ -100,6 +100,7 @@ enum ctattr_protoinfo_tcp {
 enum ctattr_protoinfo_dccp {
         CTA_PROTOINFO_DCCP_UNSPEC,
         CTA_PROTOINFO_DCCP_STATE,
+        CTA_PROTOINFO_DCCP_ROLE,
         __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 5411d63f31a5..8e757dd53396 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -633,6 +633,8 @@ static int dccp_to_nlattr(struct sk_buff *skb, struct nlattr *nla,
         if (!nest_parms)
                 goto nla_put_failure;
         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_nest_end(skb, nest_parms);
         read_unlock_bh(&dccp_lock);
         return 0;
@@ -644,6 +646,7 @@ 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 },
 };
 
 static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct)
@@ -661,11 +664,21 @@ static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct)
                 return err;
 
         if (!tb[CTA_PROTOINFO_DCCP_STATE] ||
-            nla_get_u8(tb[CTA_PROTOINFO_DCCP_STATE]) >= CT_DCCP_IGNORE)
+            !tb[CTA_PROTOINFO_DCCP_ROLE] ||
+            nla_get_u8(tb[CTA_PROTOINFO_DCCP_ROLE]) > CT_DCCP_ROLE_MAX ||
+            nla_get_u8(tb[CTA_PROTOINFO_DCCP_STATE]) >= CT_DCCP_IGNORE) {
                 return -EINVAL;
+        }
 
         write_lock_bh(&dccp_lock);
         ct->proto.dccp.state = nla_get_u8(tb[CTA_PROTOINFO_DCCP_STATE]);
+        if (nla_get_u8(tb[CTA_PROTOINFO_DCCP_ROLE]) == CT_DCCP_ROLE_CLIENT) {
+                ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_CLIENT;
+                ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_SERVER;
+        } else {
+                ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_SERVER;
+                ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_CLIENT;
+        }
         write_unlock_bh(&dccp_lock);
         return 0;
 }