ip: fix ip zero checksum verification

[vpp.git] / src / vnet / ip / ip4_format.c

diff --git a/src/vnet/ip/ip4_format.c b/src/vnet/ip/ip4_format.c
index 786a01d..c6639b2 100644 (file)
--- a/src/vnet/ip/ip4_format.c
+++ b/src/vnet/ip/ip4_format.c
@@ -150,9 +150,10 @@ format_ip4_header (u8 * s, va_list * args)
 
   /* Check and report invalid checksums. */
   {
-    u16 c = ip4_header_checksum (ip);
-    if (c != ip->checksum)
-      s = format (s, " (should be 0x%04x)", clib_net_to_host_u16 (c));
+    if (!ip4_header_checksum_is_valid (ip))
+      s =
+       format (s, " (should be 0x%04x)",
+               clib_net_to_host_u16 (ip4_header_checksum (ip)));
   }
 
   s = format (s, " dscp %U ecn %U",