Based on a patch from Marc Binderberger, fix the handling of non-control

packets.

Author: Guy Harris

print-bfd.c

@@ -171,13 +171,17 @@ bfd_print(register const u_char *pptr, register u_int len, register u_int port)
 {
         const struct bfd_header_t *bfd_header;
         const struct bfd_auth_header_t *bfd_auth_header;
-        u_int8_t version;
+        u_int8_t version = 0;
 
         bfd_header = (const struct bfd_header_t *)pptr;
-        TCHECK(*bfd_header);
-        version = BFD_EXTRACT_VERSION(bfd_header->version_diag);
-
-        switch (port << 8 | version) {
+        if (port == BFD_CONTROL_PORT) {
+            TCHECK(*bfd_header);
+            version = BFD_EXTRACT_VERSION(bfd_header->version_diag);
+        } else if (port == BFD_ECHO_PORT) {
+            /* Echo is BFD v1 only */
+            version = 1;
+        }
+        switch ((port << 8) | version) {
 
             /* BFDv0 */
         case (BFD_CONTROL_PORT << 8):