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If the HeadersLen field of a Post or Reply PDU is 0, don't try to 

dissect the ContentType or Headers fields, as they're not there.

If there's no header data left over after the ContentType field, don't
try to dissect the Headers field.

svn path=/trunk/; revision=3749
This commit is contained in:
Guy Harris 2001-07-20 08:40:54 +00:00
parent df245bc47f
commit 93265f73d2
1 changed files with 25 additions and 13 deletions
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38
packet-wsp.c
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@ -2,7 +2,7 @@
*
* Routines to dissect WSP component of WAP traffic.
*
* $Id: packet-wsp.c,v 1.27 2001/07/20 08:16:11 guy Exp $
* $Id: packet-wsp.c,v 1.28 2001/07/20 08:40:54 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
@ -1138,7 +1138,10 @@ dissect_wsp_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
add_uri (wsp_tree, tvb, uriStart, offset);
offset += uriLength;
ti = proto_tree_add_item (wsp_tree, hf_wsp_header_length,tvb,headerStart,count,bo_little_endian);
ti = proto_tree_add_uint (wsp_tree, hf_wsp_header_length,tvb,headerStart,count,headersLength);
if (headersLength == 0)
break;
contentTypeStart = offset;
nextOffset = add_content_type (wsp_tree,
@ -1146,10 +1149,13 @@ dissect_wsp_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
&contentTypeStr);
/* Add headers subtree that will hold the headers fields */
/* Runs from nextOffset for value-(length of content-type field)*/
/* Runs from nextOffset for headersLength-(length of content-type field)*/
headerLength = headersLength-(nextOffset-contentTypeStart);
tmp_tvb = tvb_new_subset (tvb, nextOffset, headerLength, headerLength);
add_headers (wsp_tree, tmp_tvb);
if (headerLength > 0)
{
tmp_tvb = tvb_new_subset (tvb, nextOffset, headerLength, headerLength);
add_headers (wsp_tree, tmp_tvb);
}
/* TODO: Post DATA */
/* Runs from start of headers+headerLength to end of frame */
@ -1164,9 +1170,12 @@ dissect_wsp_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
if (tree) {
ti = proto_tree_add_item (wsp_tree, hf_wsp_header_status,tvb,offset,1,bo_little_endian);
count = 0; /* Initialise count */
value = tvb_get_guintvar (tvb, offset+1, &count);
headersLength = tvb_get_guintvar (tvb, offset+1, &count);
nextOffset = offset + 1 + count;
ti = proto_tree_add_uint (wsp_tree, hf_wsp_header_length,tvb,offset+1,count,value);
ti = proto_tree_add_uint (wsp_tree, hf_wsp_header_length,tvb,offset+1,count,headersLength);
if (headersLength == 0)
break;
contentTypeStart = nextOffset;
nextOffset = add_content_type (wsp_tree,
@ -1174,14 +1183,17 @@ dissect_wsp_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
&contentTypeStr);
/* Add headers subtree that will hold the headers fields */
/* Runs from nextOffset for value-(length of content-type field)*/
headerLength = value-(nextOffset-contentTypeStart);
tmp_tvb = tvb_new_subset (tvb, nextOffset, headerLength, headerLength);
add_headers (wsp_tree, tmp_tvb);
offset += count+value+1;
/* Runs from nextOffset for headersLength-(length of content-type field)*/
headerLength = headersLength-(nextOffset-contentTypeStart);
if (headerLength > 0)
{
tmp_tvb = tvb_new_subset (tvb, nextOffset, headerLength, headerLength);
add_headers (wsp_tree, tmp_tvb);
}
offset += count+headerLength+1;
/* TODO: Data - decode WMLC */
/* Runs from offset+1+count+value+1 to end of frame */
/* Runs from offset+1+count+headerLength+1 to end of frame */
if (offset < tvb_reported_length (tvb))
{
ti = proto_tree_add_item (wsp_tree, hf_wsp_reply_data,tvb,offset,tvb_length_remaining(tvb, offset),bo_little_endian);