ipset: fix the Netlink sequence number

Do not use time() as a Netlink sequence number for each message,
as otherwise the same seq number will be used when sending
another message in the same second.  Instead use time() just for
initialization, then increment per message.

Signed-off-by: Holger Eitzenberger <holger@eitzenberger.org>
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/mnl.c b/lib/mnl.c
index 683dba2..77e4faa 100644
--- a/lib/mnl.c
+++ b/lib/mnl.c
@@ -75,7 +75,7 @@ ipset_mnl_fill_hdr(struct ipset_handle *handle, enum ipset_cmd cmd,
 	nlh->nlmsg_flags = cmdflags[cmd - 1];
 	if (envflags & IPSET_ENV_EXIST)
 	    	nlh->nlmsg_flags &=  ~NLM_F_EXCL;
-	nlh->nlmsg_seq = handle->seq = time(NULL);
+	nlh->nlmsg_seq = ++handle->seq;
 
 	nfg = mnl_nlmsg_put_extra_header(nlh, sizeof(struct nfgenmsg));
 	nfg->nfgen_family = AF_INET;
@@ -135,6 +135,7 @@ ipset_mnl_init(mnl_cb_t *cb_ctl, void *data)
 	handle->portid = mnl_socket_get_portid(handle->h);
 	handle->cb_ctl = cb_ctl;
 	handle->data = data;
+	handle->seq = time(NULL);
 	
 	return handle;