[PATCH conntrack] conntrack: unbreak -U command, use correct family

[Pablo Neira Ayuso <pablo@netfilter.org>]

Set the family from the conntrack object, otherwise, if -f is not specified
and the kernel bails out with:

 # conntrack -U -p tcp -m 1
 Operation failed: Not supported
 conntrack v1.4.7 (conntrack-tools): Operation failed: Not supported

Reported-by: Tony He <huangya90@gmail.com>
Fixes: b7a396b70015 ("conntrack: use libmnl for updating conntrack table")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/conntrack.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/conntrack.c b/src/conntrack.c
index bf727391bcf6..69a8fde6b5ee 100644
--- a/src/conntrack.c
+++ b/src/conntrack.c
@@ -2184,14 +2184,16 @@ static int mnl_nfct_update_cb(const struct nlmsghdr *nlh, void *data)
 	if (nfct_cmp(tmp, ct, NFCT_CMP_ALL | NFCT_CMP_MASK))
 		goto destroy_ok;
 
-	res = nfct_mnl_request(modifier_sock, NFNL_SUBSYS_CTNETLINK, cmd->family,
+	res = nfct_mnl_request(modifier_sock, NFNL_SUBSYS_CTNETLINK,
+			       nfct_get_attr_u8(ct, ATTR_ORIG_L3PROTO),
 			       IPCTNL_MSG_CT_NEW, NLM_F_ACK, NULL, tmp, NULL);
 	if (res < 0) {
 		fprintf(stderr, "Operation failed: %s\n",
 			err2str(errno, CT_UPDATE));
 	}
 
-	res = nfct_mnl_request(modifier_sock, NFNL_SUBSYS_CTNETLINK, cmd->family,
+	res = nfct_mnl_request(modifier_sock, NFNL_SUBSYS_CTNETLINK,
+			       nfct_get_attr_u8(ct, ATTR_ORIG_L3PROTO),
 			       IPCTNL_MSG_CT_GET, NLM_F_ACK,
 			       mnl_nfct_print_cb, tmp, NULL);
 	if (res < 0) {
-- 
2.30.2