conntrackd: implement selective flushing for `-t' and `-F' commands

This patch changes the current behaviour of `-t' and `-F' commands,
that results in flushing the kernel conntrack table. With this patch,
the entries that match the Filter clauses in conntrackd.conf are
ignored.

This fixes the situation in which some local ssh connection to the
firewall is lost during the failover (since `-t' is invoked from the
primary-backup.sh script).

Note that the Filter clause tells what entries have to be ignored,
ie. the entries that do not need to be replicated. It makes sense
not to flush entries that are not replicated (usually traffic to
the local firewall).

Reported-by: Gaurav Sinha <gaurav.sinha@vyatta.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/netlink.h b/include/netlink.h
index 3bde30c..9a33083 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -12,7 +12,7 @@ struct nlif_handle *nl_init_interface_handler(void);
 int nl_send_resync(struct nfct_handle *h);
 void nl_resize_socket_buffer(struct nfct_handle *h);
 int nl_dump_conntrack_table(struct nfct_handle *h);
-int nl_flush_conntrack_table(struct nfct_handle *h);
+int nl_flush_conntrack_table_selective(void);
 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 *ct, int timeout);
 int nl_update_conntrack(struct nfct_handle *h, const struct nf_conntrack *ct, int timeout);