? ktrace.out
Index: print-ip.c
===================================================================
RCS file: /cvs/src/usr.sbin/tcpdump/print-ip.c,v
retrieving revision 1.51
diff -u -p -r1.51 print-ip.c
--- print-ip.c	22 Oct 2018 16:12:45 -0000	1.51
+++ print-ip.c	19 Sep 2019 12:03:56 -0000
@@ -472,6 +472,9 @@ ip_print(const u_char *bp, u_int length)
 #define IPPROTO_ESP 50
 #endif
 		case IPPROTO_ESP:
+			(void)printf("%s > %s: ",
+			    ipaddr_string(&ip->ip_src),
+			    ipaddr_string(&ip->ip_dst));
 			esp_print(cp, len, (const u_char *)ip);
 			break;
 
Index: print-ip6.c
===================================================================
RCS file: /cvs/src/usr.sbin/tcpdump/print-ip6.c,v
retrieving revision 1.28
diff -u -p -r1.28 print-ip6.c
--- print-ip6.c	22 Oct 2018 16:12:45 -0000	1.28
+++ print-ip6.c	19 Sep 2019 12:03:56 -0000
@@ -117,7 +117,7 @@ ip6_print(const u_char *bp, u_int length
 #endif
 		if (cp == (u_char *)(ip6 + 1) &&
 		    nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
-		    nh != IPPROTO_ESP && nh != IPPROTO_AH &&
+		    nh != IPPROTO_AH &&
 		    (vflag || (nh != IPPROTO_IPV4 && nh != IPPROTO_IPV6))) {
 			(void)printf("%s > %s: ", ip6addr_string(&ip6->ip6_src),
 				     ip6addr_string(&ip6->ip6_dst));