use a mnemonic constant in rpl_daoack_print()

diff --git a/print-icmp6.c b/print-icmp6.c
index 811f0ebd5d155bcdce02560a8ea5169c794200d1..e57c46eecea67ff6985747bc9c8bbefe0f934480 100644 (file)
--- a/print-icmp6.c
+++ b/print-icmp6.c
@@ -784,7 +784,7 @@ rpl_daoack_print(netdissect_options *ndo,
         bp += ND_RPL_DAOACK_MIN_LEN;
         length -= ND_RPL_DAOACK_MIN_LEN;
         if(RPL_DAOACK_D(daoack->rpl_flags)) {
         bp += ND_RPL_DAOACK_MIN_LEN;
         length -= ND_RPL_DAOACK_MIN_LEN;
         if(RPL_DAOACK_D(daoack->rpl_flags)) {

-                ND_TCHECK2(daoack->rpl_dagid, 16);
+                ND_TCHECK2(daoack->rpl_dagid, DAGID_LEN);

                 if (length < DAGID_LEN)
                        goto tooshort;
                 rpl_format_dagid(dagid_str, daoack->rpl_dagid);
                 if (length < DAGID_LEN)
                        goto tooshort;
                 rpl_format_dagid(dagid_str, daoack->rpl_dagid);