[Qemu-devel] [PULL 10/14] net/colo-compare.c: Add vnet packet's tcp/udp/icmp compare

[Jason Wang <jasowang@redhat.com>]

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

COLO-Proxy just focus on packet payload, so we skip vnet header.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 net/colo-compare.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/colo-compare.c b/net/colo-compare.c
index 95911a2..ca67c68 100644
--- a/net/colo-compare.c
+++ b/net/colo-compare.c
@@ -201,8 +201,11 @@ static int colo_packet_compare_common(Packet *ppkt, Packet *spkt, int offset)
                                    sec_ip_src, sec_ip_dst);
     }
 
+    offset = ppkt->vnet_hdr_len + offset;
+
     if (ppkt->size == spkt->size) {
-        return memcmp(ppkt->data + offset, spkt->data + offset,
+        return memcmp(ppkt->data + offset,
+                      spkt->data + offset,
                       spkt->size - offset);
     } else {
         trace_colo_compare_main("Net packet size are not the same");
@@ -261,8 +264,9 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
      */
     if (ptcp->th_off > 5) {
         ptrdiff_t tcp_offset;
+
         tcp_offset = ppkt->transport_header - (uint8_t *)ppkt->data
-                     + (ptcp->th_off * 4);
+                     + (ptcp->th_off * 4) - ppkt->vnet_hdr_len;
         res = colo_packet_compare_common(ppkt, spkt, tcp_offset);
     } else if (ptcp->th_sum == stcp->th_sum) {
         res = colo_packet_compare_common(ppkt, spkt, ETH_HLEN);
-- 
2.7.4