* [libmnl PATCH] Improve nf-queue example: Avoid possible NULL pointer dereference
@ 2011-08-24 16:48 Thomas Jarosch
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From: Thomas Jarosch @ 2011-08-24 16:48 UTC (permalink / raw)
To: netfilter-devel
Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
---
examples/netfilter/nf-queue.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/examples/netfilter/nf-queue.c b/examples/netfilter/nf-queue.c
index 3658ba2..a0ace28 100644
--- a/examples/netfilter/nf-queue.c
+++ b/examples/netfilter/nf-queue.c
@@ -72,9 +72,11 @@ static int queue_cb(const struct nlmsghdr *nlh, void *data)
if (tb[NFQA_PACKET_HDR]) {
ph = mnl_attr_get_payload(tb[NFQA_PACKET_HDR]);
id = ntohl(ph->packet_id);
- }
- printf("packet received (id=%u hw=0x%04x hook=%u)\n",
- id, ntohs(ph->hw_protocol), ph->hook);
+
+ printf("packet received (id=%u hw=0x%04x hook=%u)\n",
+ id, ntohs(ph->hw_protocol), ph->hook);
+ } else
+ printf("packet received without header\n");
return MNL_CB_OK + id;
}
--
1.7.4.4
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