use ether_tryprint, which looks inside the ether packet.

ether_print just prints the ether header.

diff --git a/usr.sbin/tcpdump/print-gre.c b/usr.sbin/tcpdump/print-gre.c
index d60877c..b1ecc2f 100644 (file)
--- a/usr.sbin/tcpdump/print-gre.c
+++ b/usr.sbin/tcpdump/print-gre.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: print-gre.c,v 1.17 2018/02/09 00:06:51 dlg Exp $      */
+/*     $OpenBSD: print-gre.c,v 1.18 2018/02/09 04:08:26 dlg Exp $      */
 
 /*
  * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
@@ -257,7 +257,7 @@ gre_print_0(const u_char *p, u_int length)
                mpls_print(p, length);
                break;
        case ETHERTYPE_TRANSETHER:
-               ether_print(p, length);
+               ether_tryprint(p, length, 0);
                break;
        default:
                printf("unknown-proto-%04x", proto);