/*
* Dissect RTSE PDUs inside a PPDU.
*/
static void
dissect_rtse(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
{
int offset = 0;
int old_offset;
proto_item *item=NULL;
proto_tree *tree=NULL;
proto_tree *next_tree=NULL;
tvbuff_t *next_tvb = NULL;
tvbuff_t *data_tvb = NULL;
fragment_data *frag_msg = NULL;
guint32 fragment_length;
guint32 rtse_id = 0;
gboolean data_handled = FALSE;
conversation_t *conversation = NULL;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
/* save parent_tree so subdissectors can create new top nodes */
top_tree=parent_tree;
/* do we have application context from the acse dissector? */
if( !pinfo->private_data ){
if(parent_tree){
proto_tree_add_text(parent_tree, tvb, offset, -1,
"Internal error:can't get application context from ACSE dissector.");
}
return ;
} else {
session = ( (struct SESSION_DATA_STRUCTURE*)(pinfo->private_data) );
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RTSE");
col_clear(pinfo->cinfo, COL_INFO);
if (rtse_reassemble &&
((session->spdu_type == SES_DATA_TRANSFER) ||
(session->spdu_type == SES_MAJOR_SYNC_POINT))) {
/* Use conversation index as fragment id */
conversation = find_conversation (pinfo->fd->num,
&pinfo->src, &pinfo->dst, pinfo->ptype,
pinfo->srcport, pinfo->destport, 0);
if (conversation != NULL) {
rtse_id = conversation->index;
}
session->rtse_reassemble = TRUE;
}
if (rtse_reassemble && session->spdu_type == SES_MAJOR_SYNC_POINT) {
frag_msg = fragment_end_seq_next (pinfo, rtse_id, rtse_segment_table,
rtse_reassembled_table);
next_tvb = process_reassembled_data (tvb, offset, pinfo, "Reassembled RTSE",
frag_msg, &rtse_frag_items, NULL, parent_tree);
}
if(parent_tree){
item = proto_tree_add_item(parent_tree, proto_rtse, next_tvb ? next_tvb : tvb, 0, -1, FALSE);
tree = proto_item_add_subtree(item, ett_rtse);
}
if (rtse_reassemble && session->spdu_type == SES_DATA_TRANSFER) {
/* strip off the OCTET STRING encoding - including any CONSTRUCTED OCTET STRING */
dissect_ber_octet_string(FALSE, &asn1_ctx, tree, tvb, offset, hf_rtse_segment_data, &data_tvb);
if (data_tvb) {
fragment_length = tvb_length_remaining (data_tvb, 0);
proto_item_append_text(asn1_ctx.created_item, " (%u byte%s)", fragment_length,
plurality(fragment_length, "", "s"));
frag_msg = fragment_add_seq_next (data_tvb, 0, pinfo,
rtse_id, rtse_segment_table,
rtse_reassembled_table, fragment_length, TRUE);
if (frag_msg && pinfo->fd->num != frag_msg->reassembled_in) {
/* Add a "Reassembled in" link if not reassembled in this frame */
proto_tree_add_uint (tree, *(rtse_frag_items.hf_reassembled_in),
data_tvb, 0, 0, frag_msg->reassembled_in);
}
pinfo->fragmented = TRUE;
data_handled = TRUE;
} else {
fragment_length = tvb_length_remaining (tvb, offset);
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, "[RTSE fragment, %u byte%s]",
fragment_length, plurality(fragment_length, "", "s"));
} else if (rtse_reassemble && session->spdu_type == SES_MAJOR_SYNC_POINT) {
if (next_tvb) {
/* ROS won't do this for us */
session->ros_op = (ROS_OP_INVOKE | ROS_OP_ARGUMENT);
offset=dissect_ber_external_type(FALSE, tree, next_tvb, 0, &asn1_ctx, -1, call_rtse_external_type_callback);
} else {
offset = tvb_length (tvb);
}
pinfo->fragmented = FALSE;
data_handled = TRUE;
}
if (!data_handled) {
while (tvb_reported_length_remaining(tvb, offset) > 0){
old_offset=offset;
offset=dissect_rtse_RTSE_apdus(TRUE, tvb, offset, &asn1_ctx, tree, -1);
if(offset == old_offset){
item = proto_tree_add_text(tree, tvb, offset, -1, "Unknown RTSE PDU");
if(item){
expert_add_info_format (pinfo, item, PI_UNDECODED, PI_WARN, "Unknown RTSE PDU");
next_tree=proto_item_add_subtree(item, ett_rtse_unknown);
dissect_unknown_ber(pinfo, tvb, offset, next_tree);
}
offset = tvb_length(tvb);
break;
}
}
}
top_tree = NULL;
}
/*--- Included file: packet-wlancertextn-ett.c ---*/
#line 1 "packet-wlancertextn-ett.c"
static gint ett_wlancertextn_SSIDList = -1;
/*--- End of included file: packet-wlancertextn-ett.c ---*/
#line 51 "packet-wlancertextn-template.c"
/*--- Included file: packet-wlancertextn-fn.c ---*/
#line 1 "packet-wlancertextn-fn.c"
static int
dissect_wlancertextn_SSID(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static const ber_sequence_t SSIDList_sequence_of[1] = {
{ &hf_wlancertextn_SSIDList_item, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_wlancertextn_SSID },
};
static int
dissect_wlancertextn_SSIDList(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence_of(implicit_tag, actx, tree, tvb, offset,
SSIDList_sequence_of, hf_index, ett_wlancertextn_SSIDList);
return offset;
static int
dissect_tcap_param(asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset)
{
gint tag_offset, saved_offset, len_offset;
tvbuff_t *next_tvb;
proto_tree *subtree;
proto_item *pi;
gint8 class;
gboolean pc;
gint32 tag;
guint32 len;
guint32 tag_length;
guint32 len_length;
gboolean ind_field;
while (tvb_reported_length_remaining(tvb, offset) > 0)
{
saved_offset = offset;
offset = get_ber_identifier(tvb, offset, &class, &pc, &tag);
tag_offset = offset;
offset = get_ber_length(tvb, offset, &len, &ind_field);
len_offset = offset;
tag_length = tag_offset - saved_offset;
len_length = len_offset - tag_offset;
if (pc)
{
pi = proto_tree_add_text(tree, tvb, saved_offset,
len + (len_offset - saved_offset),
"CONSTRUCTOR");
subtree = proto_item_add_subtree(pi, ett_param);
proto_tree_add_uint_format(subtree, hf_tcap_tag, tvb,
saved_offset, tag_length, tag,
"CONSTRUCTOR Tag");
proto_tree_add_uint(subtree, hf_tcap_tag, tvb, saved_offset,
tag_length, class);
proto_tree_add_uint(subtree, hf_tcap_length, tvb, tag_offset,
len_length, len);
if (len-(2*ind_field)) /*should always be positive unless we get an empty contructor pointless? */
{
next_tvb = tvb_new_subset(tvb, offset, len-(2*ind_field),
len-(2*ind_field));
dissect_tcap_param(actx, subtree,next_tvb,0);
}
if (ind_field)
proto_tree_add_text(subtree, tvb, offset+len-2, 2, "CONSTRUCTOR EOC");
offset += len;
}
else
{
pi = proto_tree_add_text(tree, tvb, saved_offset,
len + (len_offset - saved_offset),
"Parameter (0x%.2x)", tag);
subtree = proto_item_add_subtree(pi, ett_param);
proto_tree_add_uint(subtree, hf_tcap_tag, tvb, saved_offset,
tag_length, tag);
proto_tree_add_uint(subtree, hf_tcap_length, tvb,
saved_offset+tag_length, len_length, len);
if (len) /* check for NULLS */
{
next_tvb = tvb_new_subset(tvb, offset, len, len);
dissect_ber_octet_string(TRUE, actx, tree, next_tvb, 0,
hf_tcap_data, NULL);
}
offset += len;
}
}
