[libvirt] [PATCH 3/3] nwfilter: Increase buffer size for libpcap

[Stefan Berger]

From: Stefan Berger <stefanb at linux.vnet.ibm.com>

Libpcap 1.5 requires a larger buffer than previous pcap versions.
Adjust the size of the buffer to 128kb.

This patch should address symptoms in BZ 1071181 and BZ 731059

Signed-off-by: Stefan Berger <stefanb at linux.vnet.ibm.com>
---
 src/nwfilter/nwfilter_dhcpsnoop.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/nwfilter/nwfilter_dhcpsnoop.c b/src/nwfilter/nwfilter_dhcpsnoop.c
index 7cb0ac0..ab9bf09 100644
--- a/src/nwfilter/nwfilter_dhcpsnoop.c
+++ b/src/nwfilter/nwfilter_dhcpsnoop.c
@@ -250,7 +250,11 @@ struct _virNWFilterDHCPDecodeJob {
 # define DHCP_PKT_BURST         50 /* pkts/sec */
 # define DHCP_BURST_INTERVAL_S  10 /* sec */
 
-# define PCAP_BUFFERSIZE        (DHCP_PKT_BURST * PCAP_PBUFSIZE / 2)
+/*
+ * libpcap 1.5 requires a 128kb buffer
+ * 128 kb is bigger than (DHCP_PKT_BURST * PCAP_PBUFSIZE / 2)
+ */
+# define PCAP_BUFFERSIZE        (128 * 1024)
 
 # define MAX_QUEUED_JOBS        (DHCP_PKT_BURST + 2 * DHCP_PKT_RATE)
 
-- 
1.8.1.4