From: Guy Harris <gharris@steve.local>
Date: Thu, 5 Mar 2009 09:42:33 +0000 (-0800)
Subject: The checksum is optional in UDP-over-IPv4, so go back to the earlier
X-Git-Tag: tcpdump-4.1.0~133
X-Git-Url: https://git.tcpdump.org/tcpdump/commitdiff_plain/f7232ea6197e1158b134a636237cb05fe73f2851?ds=inline

The checksum is optional in UDP-over-IPv4, so go back to the earlier
behavior where it's checked only with -vv and higher.
---

diff --git a/print-udp.c b/print-udp.c
index f4517fee..5e564cde 100644
--- a/print-udp.c
+++ b/print-udp.c
@@ -568,7 +568,7 @@ udp_print(register const u_char *bp, u_int length,
 	}
 	udpipaddr_print(ip, sport, dport);
 
-	if (IP_V(ip) == 4 && vflag && !Kflag && !fragmented) {
+	if (IP_V(ip) == 4 && (vflag > 1) && !Kflag && !fragmented) {
 		int sum = up->uh_sum;
 		if (sum == 0) {
 			(void)printf("[no cksum] ");