DECnet: Add comments about the specification. [skip ci]

diff --git a/print-decnet.c b/print-decnet.c
index 6c1f0e1fd0767b43327f561c4f54786718fafded..989776b4df316af5fc91082fa39beac1dc56a6eb 100644 (file)
--- a/print-decnet.c
+++ b/print-decnet.c
@@ -20,6 +20,14 @@
  */
 
 /* \summary: DECnet printer */
+/*
+ * specification: Section 10.0 MESSAGES
+ * DECnet Digital Network Architecture
+ * Phase IV
+ * Routing Layer Functional Specification
+ * Order No. AA-X435A-TK
+ * Version 2.0.0 December 1983
+ */
 
 #include <config.h>
 
@@ -480,6 +488,11 @@ decnet_print(netdissect_options *ndo,
                goto invalid;
        }
 
+       /*
+        * This length does not seem to be in any specification, but it is present
+        * in the test case packet capture, which is consistent with the Wireshark
+        * protocol decoder.
+        */
        pktlen = GET_LE_U_2(ap);
        if (pktlen < sizeof(struct shorthdr)) {
                ND_PRINT(" (pktlen %u < %zu)", pktlen, sizeof(struct shorthdr));