#include "config.h"
-#include <glib.h>
-
#include <epan/packet.h>
#include <epan/to_str.h>
-#include <epan/wmem/wmem.h>
#include <epan/reassemble.h>
#include <epan/expert.h>
#include <epan/stats_tree.h>
/* formerly bacapp.h contains definitions and forward declarations */
-#ifndef FAULT
-#define FAULT proto_tree_add_text(subtree, tvb, offset, tvb_length(tvb) - offset, "something is going wrong here !!"); \
- offset = tvb_length(tvb);
-#endif
-
/* BACnet PDU Types */
#define BACAPP_TYPE_CONFIRMED_SERVICE_REQUEST 0
#define BACAPP_TYPE_UNCONFIRMED_SERVICE_REQUEST 1
* listOfReadAccessResults SEQUENCE OF ReadAccessResult
* }
* @param tvb the tv buffer of the current data
- * @parma pinfo
+ * @param pinfo the packet info of the current data
* @param tree the tree to append this item to
* @param offset the offset in the tvb
* @return offset modified
static int hf_BACnetNamedTag = -1;
static int hf_BACnetTagClass = -1;
static int hf_BACnetCharacterSet = -1;
+static int hf_BACnetCodePage = -1;
static int hf_bacapp_tag_lvt = -1;
static int hf_bacapp_tag_ProcessId = -1;
static int hf_bacapp_uservice = -1;
static gint ett_bacapp_value = -1;
static expert_field ei_bacapp_bad_length = EI_INIT;
+static expert_field ei_bacapp_bad_tag = EI_INIT;
static gint32 propertyIdentifier = -1;
static gint32 propertyArrayIndex = -1;
bacapp_stats_tree_instanceid, bacapp_instanceid_stats_tree_init, NULL);
}
-/* 'data' must be ep_ allocated */
+/* 'data' must be allocated with wmem packet scope */
static gint
updateBacnetInfoValue(gint whichval, const gchar *data)
{
if (tree) {
proto_tree *subtree;
- if (tag_is_opening(tag))
- ti = proto_tree_add_text(tree, tvb, offset, tag_len, "{[%u]", *tag_no );
- else if (tag_is_closing(tag))
- ti = proto_tree_add_text(tree, tvb, offset, tag_len, "}[%u]", *tag_no );
- else if (tag_is_context_specific(tag)) {
- ti = proto_tree_add_text(tree, tvb, offset, tag_len,
- "Context Tag: %u, Length/Value/Type: %u",
- *tag_no, *lvt);
- } else
- ti = proto_tree_add_text(tree, tvb, offset, tag_len,
- "Application Tag: %s, Length/Value/Type: %u",
- val_to_str(*tag_no,
- BACnetApplicationTagNumber,
- ASHRAE_Reserved_Fmt),
- *lvt);
+ if (tag_is_opening(tag)) {
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, tag_len,
+ ett_bacapp_tag, &ti, "{[%u]", *tag_no );
+ } else if (tag_is_closing(tag)) {
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, tag_len,
+ ett_bacapp_tag, &ti, "}[%u]", *tag_no );
+ } else if (tag_is_context_specific(tag)) {
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, tag_len,
+ ett_bacapp_tag, &ti,
+ "Context Tag: %u, Length/Value/Type: %u", *tag_no, *lvt);
+ } else {
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, tag_len,
+ ett_bacapp_tag, &ti,
+ "Application Tag: %s, Length/Value/Type: %u",
+ val_to_str(*tag_no, BACnetApplicationTagNumber,
+ ASHRAE_Reserved_Fmt),
+ *lvt);
+ }
/* details if needed */
- subtree = proto_item_add_subtree(ti, ett_bacapp_tag);
proto_tree_add_item(subtree, hf_BACnetTagClass, tvb, offset, 1, ENC_BIG_ENDIAN);
if (tag_is_extended_tag_number(tag)) {
proto_tree_add_uint_format(subtree,
tvb, lvt_offset, lvt_len, *lvt);
} /* if (tree) */
- if (*lvt > tvb_length(tvb)) {
+ if (*lvt > tvb_reported_length(tvb)) {
expert_add_info_format(pinfo, ti, &ei_bacapp_bad_length,
"LVT length too long: %d > %d", *lvt,
- tvb_length(tvb));
+ tvb_reported_length(tvb));
*lvt = 1;
}
offset += fTagHeader(tvb, pinfo, offset, &tag_no, &tag_info, &lvt);
if (lvt > 0) {
- tmp = tvb_bytes_to_ep_str(tvb, offset, lvt);
+ tmp = tvb_bytes_to_str(wmem_packet_scope(), tvb, offset, lvt);
subtree = proto_tree_add_subtree_format(tree, tvb, offset, lvt,
ett_bacapp_tag, NULL, "%s %s", label, tmp);
offset += lvt;
offset += fTagHeader(tvb, pinfo, offset, &tag_no, &tag_info, &lvt);
- subtree = proto_tree_add_subtree(tree, tvb, offset, 6, ett_bacapp_tag, NULL, label); /* just add the label, with the tagHeader information in its subtree */
-
- if (lvt > 0) {
- if (lvt == 6) { /* we have 6 Byte IP Address with 4 Octets IPv4 and 2 Octets Port Information */
-
- proto_tree_add_item(tree, hf_bacapp_tag_IPV4, tvb, offset, 4, ENC_BIG_ENDIAN);
- proto_tree_add_item(tree, hf_bacapp_tag_PORT, tvb, offset+4, 2, ENC_BIG_ENDIAN);
-
- } else {
- if (lvt == 18) { /* we have 18 Byte IP Address with 16 Octets IPv6 and 2 Octets Port Information */
-
- proto_tree_add_item(tree, hf_bacapp_tag_IPV6, tvb, offset, 16, ENC_NA);
- proto_tree_add_item(tree, hf_bacapp_tag_PORT, tvb, offset+16, 2, ENC_BIG_ENDIAN);
-
- } else { /* we have 1 Byte MS/TP Address or anything else interpreted as an address */
- subtree = proto_tree_add_subtree(tree, tvb, offset, lvt,
- ett_bacapp_tag, NULL, tvb_bytes_to_ep_str(tvb, offset, lvt));
- }
- }
- offset += lvt;
+ /* just add the label, with the tagHeader information in its subtree */
+ subtree = proto_tree_add_subtree(tree, tvb, offset, 6, ett_bacapp_tag, NULL, label);
+
+ if (lvt == 6) { /* we have 6 Byte IP Address with 4 Octets IPv4 and 2 Octets Port Information */
+ proto_tree_add_item(tree, hf_bacapp_tag_IPV4, tvb, offset, 4, ENC_BIG_ENDIAN);
+ proto_tree_add_item(tree, hf_bacapp_tag_PORT, tvb, offset+4, 2, ENC_BIG_ENDIAN);
+ } else if (lvt == 18) { /* we have 18 Byte IP Address with 16 Octets IPv6 and 2 Octets Port Information */
+ proto_tree_add_item(tree, hf_bacapp_tag_IPV6, tvb, offset, 16, ENC_NA);
+ proto_tree_add_item(tree, hf_bacapp_tag_PORT, tvb, offset+16, 2, ENC_BIG_ENDIAN);
+ } else { /* we have 1 Byte MS/TP Address or anything else interpreted as an address */
+ subtree = proto_tree_add_subtree(tree, tvb, offset, lvt,
+ ett_bacapp_tag, NULL, tvb_bytes_to_str(wmem_packet_scope(), tvb, offset, lvt));
}
+ offset += lvt;
fTagHeaderTree(tvb, pinfo, subtree, start, &tag_no, &tag_info, &lvt);
{
guint8 tag_no, tag_info, character_set;
guint32 lvt, l;
- guint offs, extra = 1;
+ guint offs;
const char *coding;
guint8 *out;
proto_tree *subtree;
if (tvb_reported_length_remaining(tvb, offset) > 0) {
offs = fTagHeader(tvb, pinfo, offset, &tag_no, &tag_info, &lvt);
+ offset += offs;
+
+ character_set = tvb_get_guint8(tvb, offset);
+ offset++;
+ lvt--;
- character_set = tvb_get_guint8(tvb, offset+offs);
/* Account for code page if DBCS */
- if (character_set == 1) {
- extra = 3;
+ if (character_set == IBM_MS_DBCS) {
+ offset += 2;
+ lvt -= 2;
}
- offset += (offs+extra);
- lvt -= (extra);
do {
l = MIN(lvt, 256);
fTagHeaderTree(tvb, pinfo, subtree, start, &tag_no, &tag_info, &lvt);
proto_tree_add_item(subtree, hf_BACnetCharacterSet, tvb, start+offs, 1, ENC_BIG_ENDIAN);
- if (character_set == 1) {
- proto_tree_add_text(subtree, tvb, start+offs+1, 2, "Code Page: %d", tvb_get_ntohs(tvb, start+offs+1));
+ if (character_set == IBM_MS_DBCS) {
+ proto_tree_add_item(subtree, hf_BACnetCodePage, tvb, start+offs+1, 2, ENC_BIG_ENDIAN);
}
/* XXX - put the string value here */
}
offset += fTagHeaderTree(tvb, pinfo, tree, offset,
&tag_no, &tag_info, &lvt);
offset = fAbstractSyntaxNType(tvb, pinfo, tree, offset);
- if (tvb_length_remaining(tvb, offset) > 0) {
+ if (tvb_reported_length_remaining(tvb, offset) > 0) {
offset += fTagHeaderTree(tvb, pinfo, tree, offset,
&tag_no, &tag_info, &lvt);
}
} else {
- proto_tree_add_text(tree, tvb, offset, tvb_length(tvb) - offset,
+ proto_tree_add_text(tree, tvb, offset, tvb_reported_length(tvb) - offset,
"expected Opening Tag!");
- offset = tvb_length(tvb);
+ offset = tvb_reported_length(tvb);
}
return offset;
subtree = proto_tree_add_subtree(subtree, tvb, offset, 1, ett_bacapp_value, NULL, "monitoredPropertyIdentifier");
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
offset = fBACnetPropertyReference(tvb, pinfo, subtree, offset, 1);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
case 5: /* covIncrement */
offset = fRealTag(tvb, pinfo, tree, offset, "COV Increment: ");
tag_len = fTagHeader(tvb, pinfo, offset, &tag_no, &tag_info, &lvt);
if (fUnsigned32(tvb, offset + tag_len, lvt, &val))
- ti = proto_tree_add_text(tree, tvb, offset, lvt+tag_len,
- "%s: %s (%u)",
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, lvt+tag_len,
+ ett_bacapp_tag, &ti, "%s: %s (%u)",
label,
val_to_str_ext_const(val, &BACnetVendorIdentifiers_ext, "Unknown Vendor"),
val);
else
- ti = proto_tree_add_text(tree, tvb, offset, lvt+tag_len,
- "%s - %u octets (Unsigned)", label, lvt);
- subtree = proto_item_add_subtree(ti, ett_bacapp_tag);
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, lvt+tag_len,
+ ett_bacapp_tag, &ti, "%s - %u octets (Unsigned)", label, lvt);
fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
if ((lvt < 1) || (lvt > 2)) { /* vendorIDs >= 1 and <= 2 are supported */
- proto_tree_add_expert_format(tree, pinfo, &ei_bacapp_bad_length, tvb, 0, lvt,
+ expert_add_info_format(pinfo, ti, &ei_bacapp_bad_length,
"Wrong length indicated. Expected 1 or 2, got %u", lvt);
return offset+tag_len+lvt;
}
tag_len = fTagHeader(tvb, pinfo, offset, &tag_no, &tag_info, &lvt);
if (fUnsigned32(tvb, offset + tag_len, lvt, &val))
- ti = proto_tree_add_text(tree, tvb, offset, lvt+tag_len,
- "%s: %s (%u)", label,
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, lvt+tag_len,
+ ett_bacapp_tag, &ti, "%s: %s (%u)", label,
val_to_str_const(val, BACnetRestartReason, "Unknown reason"), val);
else
- ti = proto_tree_add_text(tree, tvb, offset, lvt+tag_len,
- "%s - %u octets (Unsigned)", label, lvt);
- subtree = proto_item_add_subtree(ti, ett_bacapp_tag);
+ subtree = proto_tree_add_subtree_format(tree, tvb, offset, lvt+tag_len,
+ ett_bacapp_tag, &ti, "%s - %u octets (Unsigned)", label, lvt);
fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
if (lvt != 1) {
- proto_tree_add_expert_format(tree, pinfo, &ei_bacapp_bad_length, tvb, 0, lvt,
+ expert_add_info_format(pinfo, ti, &ei_bacapp_bad_length,
"Wrong length indicated. Expected 1, got %u", lvt);
return offset+tag_len+lvt;
}
if (dissector_try_uint(bacapp_dissector_table,
vendor_identifier, next_tvb, pinfo, tree)) {
/* we parsed it so skip over length and we are done */
- offset += tvb_length(next_tvb);
+ offset += tvb_reported_length(next_tvb);
return offset;
}
ett_bacapp_value, NULL, "service Parameters");
propertyIdentifier = -1;
offset = fAbstractSyntaxNType(tvb, pinfo, subtree, offset);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
default:
return offset;
}
break;
case 18: /* change-of-status-flags */
+ while (tvb_reported_length_remaining(tvb, offset) > 0) {
+ /* exit loop if nothing happens inside */
+ lastoffset = offset;
+ switch (fTagNo(tvb, offset)) {
+ case 0:
+ offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
+ offset = fApplicationTypesEnumerated(tvb, pinfo, subtree, offset,
+ "present-value: ", BACnetStatusFlags);
+ offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
+ break;
+ case 1:
+ offset = fBitStringTagVS(tvb, pinfo, subtree, offset,
+ "referenced-flags: ", BACnetStatusFlags);
+ lastoffset = offset;
+ break;
+ default:
+ break;
+ }
+ if (offset == lastoffset) break; /* nothing happened, exit loop */
+ }
break;
/* todo: add new parameters here ... */
default:
subtree = proto_tree_add_subtree(subtree, tvb, offset, 1, ett_bacapp_value, NULL, "list of Values");
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
offset = fBACnetPropertyValue(tvb, pinfo, subtree, offset);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
default:
return offset;
subtree = proto_tree_add_subtree(subtree, tvb, offset, 1, ett_bacapp_value, NULL, "listOfElements");
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
offset = fAbstractSyntaxNType(tvb, pinfo, subtree, offset);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
default:
return offset;
if (tag_is_opening(tag_info)) {
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
offset = fBACnetPropertyValue(tvb, pinfo, subtree, offset);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
default:
return offset;
{
guint8 tag_no, tag_info;
guint32 lvt;
- guint lastoffset = 0, len;
- gboolean closing_found = FALSE; /* tracks when we are done decoding the fSpecialEvent entries */
+ guint lastoffset = 0;
while (tvb_reported_length_remaining(tvb, offset) > 0) { /* exit loop if nothing happens inside */
lastoffset = offset;
- len = fTagHeader(tvb, pinfo, offset, &tag_no, &tag_info, &lvt);
- /* maybe a SEQUENCE of SpecialEvents if we spot a closing tag */
+ fTagHeader(tvb, pinfo, offset, &tag_no, &tag_info, &lvt);
+ /* quit loop if we spot an un-matched closing tag */
if (tag_is_closing(tag_info)) {
- /* if we find 2 closing tags in succession we need to exit without incrementing the offset again */
- /* This handles the special case where we have a special event entry in an RPM-ACK msg */
- if ( closing_found == TRUE )
- break;
- offset += len;
- closing_found = TRUE;
- continue;
+ break;
}
-
switch (tag_no) {
case 0: /* calendarEntry */
if (tag_is_opening(tag_info)) {
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
offset = fTimeValue(tvb, pinfo, subtree, offset);
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
case 3: /* eventPriority */
offset = fUnsignedTag(tvb, pinfo, subtree, offset, "event priority: ");
default:
return offset;
}
- closing_found = FALSE; /* reset our closing tag status, we processed another open tag */
if (offset == lastoffset) break; /* nothing happened, exit loop */
}
return offset;
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
offset = fSelectionCriteria(tvb, pinfo, subtree, offset);
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
default:
return offset;
if (tag_is_opening(tag_info)) {
subtree = proto_tree_add_subtree(tree, tvb, offset, 1, ett_bacapp_value, NULL, "listOfResults");
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
case 2: /* propertyIdentifier */
offset = fPropertyIdentifierValue(tvb, pinfo, subtree, offset, 2);
offset += fTagHeaderTree(tvb, pinfo, subtree, offset, &tag_no, &tag_info, &lvt);
/* Error Code follows */
offset = fError(tvb, pinfo, subtree, offset);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
default:
return offset;
case 1: /* propertyValue */
if (tag_is_opening(tag_info)) {
offset = fBACnetPropertyValue(tvb, pinfo, subtree, offset);
- break;
+ } else {
+ expert_add_info(pinfo, subtree, &ei_bacapp_bad_tag);
}
- FAULT;
break;
default:
break;
&addresses_reassembly_table_functions);
}
+static void
+bacapp_cleanup_routine(void)
+{
+ reassembly_table_destroy(&msg_reassembly_table);
+}
+
void
proto_register_bacapp(void)
{
FT_UINT8, BASE_DEC, VALS(BACnetCharacterSet), 0,
NULL, HFILL }
},
+ { &hf_BACnetCodePage,
+ { "Code Page",
+ "bacapp.code_page",
+ FT_UINT16, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
{ &hf_BACnetTagClass,
{ "Tag Class", "bacapp.tag_class",
FT_BOOLEAN, 8, TFS(&BACnetTagClass), 0x08, NULL, HFILL }
static ei_register_info ei[] = {
{ &ei_bacapp_bad_length, { "bacapp.bad_length", PI_MALFORMED, PI_ERROR, "Wrong length indicated", EXPFILL }},
+ { &ei_bacapp_bad_tag, { "bacapp.bad_tag", PI_MALFORMED, PI_ERROR, "Wrong tag found", EXPFILL }},
};
expert_module_t* expert_bacapp;
expert_register_field_array(expert_bacapp, ei, array_length(ei));
register_dissector("bacapp", dissect_bacapp, proto_bacapp);
register_init_routine(&bacapp_init_routine);
+ register_cleanup_routine(&bacapp_cleanup_routine);
bacapp_dissector_table = register_dissector_table("bacapp.vendor_identifier",
"BACapp Vendor Identifier",
git.samba.org / metze / wireshark / wip.git / blobdiff