static void
dissect_tzsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *tzsp_tree = NULL;
proto_item *ti = NULL;
int pos = 0;
tvbuff_t *next_tvb;
guint16 encapsulation = 0;
int wtap_encap;
dissector_handle_t encap_dissector;
const char *encap_name;
const char *info;
guint8 type;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "TZSP");
col_clear(pinfo->cinfo, COL_INFO);
type = tvb_get_guint8(tvb, 1);
/* Find the dissector. */
encapsulation = tvb_get_ntohs(tvb, 2);
if (encapsulation != 0) {
wtap_encap = tzsp_encap_to_wtap_encap(encapsulation);
if ((wtap_encap != -1) &&
(encap_dissector = dissector_get_uint_handle(encap_dissector_table, wtap_encap))) {
encap_name = dissector_handle_get_short_name(encap_dissector);
}
else {
encap_name = "Unknown";
}
info = encap_name;
}
else {
wtap_encap = -1;
encap_name = "Nothing";
info = val_to_str(type, tzsp_type, "Unknown (%u)");
}
col_add_str(pinfo->cinfo, COL_INFO, info);
if (tree) {
/* Adding TZSP item and subtree */
ti = proto_tree_add_protocol_format(tree, proto_tzsp, tvb, 0,
-1, "TZSP: %s: ", info);
tzsp_tree = proto_item_add_subtree(ti, ett_tzsp);
proto_tree_add_item (tzsp_tree, hf_tzsp_version, tvb, 0, 1,
ENC_BIG_ENDIAN);
proto_tree_add_uint (tzsp_tree, hf_tzsp_type, tvb, 1, 1,
type);
proto_tree_add_uint_format (tzsp_tree, hf_tzsp_encap, tvb, 2, 2,
encapsulation, "Encapsulates: %s (%d)",
encap_name, encapsulation);
}
/*
* XXX - what about TZSP_CONFIG frames?
*
* The MIB at
*
* http://web.archive.org/web/20021221195733/http://www.networkchemistry.com/support/appnotes/SENSOR-MIB
*
* seems to indicate that you can configure the probe using SNMP;
* does TZSP_CONFIG also support that? An old version of Kismet
* included code to control a Network Chemistry WSP100 sensor:
*
* https://www.kismetwireless.net/code-old/svn/tags/kismet-2004-02-R1/wsp100source.cc
*
* and it used SNMP to configure the probe.
*/
if ((type != TZSP_NULL) && (type != TZSP_PORT)) {
pos = add_option_info(tvb, 4, tzsp_tree, ti);
if (tree)
proto_item_set_end(ti, tvb, pos);
next_tvb = tvb_new_subset_remaining(tvb, pos);
if ((encapsulation != 0)
&& ((wtap_encap == -1)
|| !dissector_try_uint(encap_dissector_table, wtap_encap,
next_tvb, pinfo, tree))) {
col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
col_add_fstr(pinfo->cinfo, COL_INFO, "TZSP_ENCAP = %u",
encapsulation);
call_dissector(data_handle, next_tvb, pinfo, tree);
}
}
}
static void
dissect_tzsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *tzsp_tree = NULL;
proto_item *ti = NULL;
int pos = 0;
tvbuff_t *next_tvb;
guint16 encapsulation = 0;
int wtap_encap;
dissector_handle_t encap_dissector;
const char *encap_name;
const char *info;
guint8 type;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "TZSP");
col_clear(pinfo->cinfo, COL_INFO);
type = tvb_get_guint8(tvb, 1);
/* Find the dissector. */
encapsulation = tvb_get_ntohs(tvb, 2);
if (encapsulation != 0) {
wtap_encap = tzsp_encap_to_wtap_encap(encapsulation);
if (wtap_encap != -1 &&
(encap_dissector = dissector_get_port_handle(encap_dissector_table, wtap_encap))) {
encap_name = dissector_handle_get_short_name(encap_dissector);
}
else {
encap_name = "Unknown";
}
info = encap_name;
}
else {
wtap_encap = -1;
encap_name = "Nothing";
info = val_to_str(type, tzsp_type, "Unknown (%u)");
}
col_add_str(pinfo->cinfo, COL_INFO, info);
if (tree) {
/* Adding TZSP item and subtree */
ti = proto_tree_add_protocol_format(tree, proto_tzsp, tvb, 0,
-1, "TZSP: %s: ", info);
tzsp_tree = proto_item_add_subtree(ti, ett_tzsp);
proto_tree_add_item (tzsp_tree, hf_tzsp_version, tvb, 0, 1,
FALSE);
proto_tree_add_uint (tzsp_tree, hf_tzsp_type, tvb, 1, 1,
type);
proto_tree_add_uint_format (tzsp_tree, hf_tzsp_encap, tvb, 2, 2,
encapsulation, "Encapsulates: %s (%d)",
encap_name, encapsulation);
}
if (type != 4 && type != 5) {
pos = add_option_info(tvb, 4, tzsp_tree, ti);
if (tree)
proto_item_set_end(ti, tvb, pos);
next_tvb = tvb_new_subset_remaining(tvb, pos);
if (encapsulation != 0
&& (wtap_encap == -1
|| !dissector_try_port(encap_dissector_table, wtap_encap,
next_tvb, pinfo, tree))) {
col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
if (check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "TZSP_ENCAP = %u",
encapsulation);
call_dissector(data_handle, next_tvb, pinfo, tree);
}
}
}
