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-rw-r--r--src/netlink.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/src/netlink.c b/src/netlink.c
index 29281f4..2fabd8d 100644
--- a/src/netlink.c
+++ b/src/netlink.c
@@ -192,7 +192,6 @@ int nl_get_conntrack(struct nfct_handle *h, const struct nf_conntrack *ct)
int nl_create_conntrack(struct nfct_handle *h, const struct nf_conntrack *orig)
{
int ret;
- uint8_t flags;
struct nf_conntrack *ct;
ct = nfct_clone(orig);
@@ -211,11 +210,14 @@ int nl_create_conntrack(struct nfct_handle *h, const struct nf_conntrack *orig)
/*
* TCP flags to overpass window tracking for recovered connections
*/
- flags = IP_CT_TCP_FLAG_BE_LIBERAL | IP_CT_TCP_FLAG_SACK_PERM;
- nfct_set_attr_u8(ct, ATTR_TCP_FLAGS_ORIG, flags);
- nfct_set_attr_u8(ct, ATTR_TCP_MASK_ORIG, flags);
- nfct_set_attr_u8(ct, ATTR_TCP_FLAGS_REPL, flags);
- nfct_set_attr_u8(ct, ATTR_TCP_MASK_REPL, flags);
+ if (nfct_attr_is_set(ct, ATTR_TCP_STATE)) {
+ uint8_t flags = IP_CT_TCP_FLAG_BE_LIBERAL |
+ IP_CT_TCP_FLAG_SACK_PERM;
+ nfct_set_attr_u8(ct, ATTR_TCP_FLAGS_ORIG, flags);
+ nfct_set_attr_u8(ct, ATTR_TCP_MASK_ORIG, flags);
+ nfct_set_attr_u8(ct, ATTR_TCP_FLAGS_REPL, flags);
+ nfct_set_attr_u8(ct, ATTR_TCP_MASK_REPL, flags);
+ }
ret = nfct_query(h, NFCT_Q_CREATE, ct);
nfct_destroy(ct);