[Qemu-devel] [PATCH V2 2/4] net/colo-compare.c: Compare the tcp packets that has the same sequence number

[Zhang Chen <zhangchen.fnst@cn.fujitsu.com>]

If primary packet's sequence number not same with secondary packet's
sequence number, no need to compare the packet other field.

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

diff --git a/net/colo-compare.c b/net/colo-compare.c
index 0f8e198..2caeb80 100644
--- a/net/colo-compare.c
+++ b/net/colo-compare.c
@@ -222,6 +222,12 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
     ptcp = (struct tcphdr *)ppkt->transport_header;
     stcp = (struct tcphdr *)spkt->transport_header;
 
+    if ((ptcp->th_flags & TH_SYN) != TH_SYN &&
+        ptcp->th_seq != stcp->th_seq) {
+        trace_colo_compare_main("colo_packet_compare_tcp seq not same");
+        return -1;
+    }
+
     /*
      * The 'identification' field in the IP header is *very* random
      * it almost never matches.  Fudge this by ignoring differences in
-- 
2.7.4