fix offset calculation of DataStatus fields if Ethernet FCS (or a similar trailer...

svn path=/trunk/; revision=15970

diff --git a/epan/dissectors/packet-pn-rt.c b/epan/dissectors/packet-pn-rt.c
index 5ff7a1b4ee7e3594b62499c6b47b4c50d04a6b25..5b029b993fca3c062914a106893fcece915af47d 100644 (file)
--- a/epan/dissectors/packet-pn-rt.c
+++ b/epan/dissectors/packet-pn-rt.c
@@ -114,7 +114,8 @@ dissect_pn_rt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 
 
   /* Initialize variables */
-  tvb_len = tvb_length(tvb);
+  tvb_len = tvb_length(tvb) - pinfo->pseudo_header->eth.fcs_len;
+  tvb_set_reported_length(tvb, tvb_len);
   pn_rt_tree = NULL;
   ds_tree = NULL;
   ti = NULL;
@@ -290,10 +291,10 @@ dissect_pn_rt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
     if (tree) {
                /* build pn_rt protocol tree with summary line */
            if (pn_rt_summary_in_tree) {
-             ti = proto_tree_add_protocol_format(tree, proto_pn_rt, tvb, 0, -1,
+             ti = proto_tree_add_protocol_format(tree, proto_pn_rt, tvb, 0, tvb_len,
                                "PROFINET %s, %s", pszProtSummary, szFieldSummary);
            } else {
-                       ti = proto_tree_add_item(tree, proto_pn_rt, tvb, 0, -1, FALSE);
+                       ti = proto_tree_add_item(tree, proto_pn_rt, tvb, 0, tvb_len, FALSE);
            }
                pn_rt_tree = proto_item_add_subtree(ti, ett_pn_rt);