extern void decompress(FILE* input_stream, FILE* output_stream)
{
CODETAB* code_table;
HTREE* huffman_tree;
/*Codebook aus der komprimierten Datei lesen*/
code_table = read_codetab(input_stream);
#ifdef DEBUG_HUFFMAN
/*Codebuch auf Bildschirm ausgeben*/
codetab_print(code_table);
#endif
/*Huffmanbaum erstellen*/
huffman_tree = create_htree_from_codetab(code_table);
#ifdef DEBUG_HUFFMAN
/*Huffmanbaum auf Bildschirm ausgeben*/
htree_print(huffman_tree);
#endif
/*Inhalt dekomprimieren*/
decode_content(input_stream, output_stream, huffman_tree);
/*Resourcen wieder freigeben*/
delete_codetab(&code_table);
delete_htree(&huffman_tree);
return;
}
void
decode_subscribe(tvbuff_t *tvb, proto_tree *tree, gint offset)
{
if (tree){
gboolean has_content = FALSE;
gboolean has_previous_parent = FALSE;
/*visit*/
offset = decode_visit(tvb, tree, offset);
if (offset == -1){
return;
}
/*has content?*/
if (tvb_get_guint8(tvb, offset) != 0){
has_content = TRUE;
}
proto_tree_add_boolean(tree, hf_scribe_has_content, tvb, offset, 1, has_content);
offset++;
if (has_content){
decode_content(tvb, tree, offset);
} else {
proto_tree_add_item(tree, hf_scribe_id, tvb, offset, 4, FALSE);
offset += 4;
/*has previous parent?*/
if (tvb_get_guint8(tvb, offset) != 0){
has_previous_parent = TRUE;
}
proto_tree_add_boolean(tree, hf_scribe_has_previous_parent, tvb, offset, 1, has_previous_parent);
offset++;
if (has_previous_parent){
proto_tree_add_item(tree, hf_scribe_previous_parent_type, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_string(tree, hf_scribe_previous_parent, tvb, offset, 20, get_id_full(tvb, offset));
offset +=20;
}
decode_nodehandle(tvb, tree, offset, "Subscriber");
}
}
}
void
decode_anycast(tvbuff_t *tvb, proto_tree *tree, gint offset)
{
if (tree){
gboolean has_content = FALSE;
/*visit*/
offset = decode_visit(tvb, tree, offset);
if (offset == -1){
return;
}
/*has content?*/
if (tvb_get_guint8(tvb, offset) != 0){
has_content = TRUE;
}
proto_tree_add_boolean(tree, hf_scribe_has_content, tvb, offset, 1, has_content);
offset++;
if (has_content){
decode_content(tvb, tree, offset);
}
}
}
static void
dissect_scribe(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti = NULL;
proto_tree *scribe_tree = NULL;
const gchar *type_string = NULL;
guint16 type;
gboolean has_source = FALSE;
gint offset = 0;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Scribe");
type = tvb_get_ntohs(tvb, offset);
type_string = val_to_str(type, scribe_msg_type, "<Unknown type %d>");
if (check_col(pinfo->cinfo, COL_INFO)){
col_clear (pinfo->cinfo, COL_INFO);
col_add_fstr(pinfo->cinfo, COL_INFO, "%d > %d %s",
pinfo->srcport, pinfo->destport, type_string);
}
/*has source?*/
if (tvb_get_guint8(tvb, offset+3) != 0){
has_source = TRUE;
}
if (tree){
ti = proto_tree_add_item(tree, proto_scribe, tvb, 0, -1, FALSE);
scribe_tree = proto_item_add_subtree(ti, ett_scribe);
proto_tree_add_item(scribe_tree, hf_scribe_type, tvb, offset, 2, FALSE);
proto_tree_add_item(scribe_tree, hf_scribe_version, tvb, offset + 2, 1, FALSE);
proto_tree_add_boolean(scribe_tree, hf_scribe_has_source, tvb, offset + 3, 1, has_source);
if (has_source){
offset = decode_nodehandle(tvb, scribe_tree, offset + 4 , "Source");
}
} else {
if (has_source){
offset = get_node_handle_len(tvb, offset + 3);
}
}
if (offset == -1){
return;
}
if(check_col(pinfo->cinfo,COL_INFO)){
print_id_into_col_info(tvb, pinfo, offset, "Topic");
}
if (tree){
offset = decode_type_and_id(tvb, scribe_tree, offset);
if (offset == -1){
return;
}
switch (type){
case SCRIBE_ANYCAST_MSG:
decode_anycast(tvb, scribe_tree, offset);
break;
case SCRIBE_SUBSCRIBE_MSG:
decode_subscribe(tvb, scribe_tree, offset);
break;
case SCRIBE_SUBSCRIBE_ACK_MSG:
decode_scribe_subscribe_ack(tvb, scribe_tree, offset);
break;
case SCRIBE_SUBSCRIBE_FAILED_MSG:
decode_scribe_failed(tvb, scribe_tree, offset);
break;
case SCRIBE_PUBLISH_MSG:
case SCRIBE_PUBLISH_REQUEST_MSG:
decode_content(tvb, scribe_tree, offset);
break;
case SCRIBE_DROP_MSG:
case SCRIBE_UNSUBSCRIBE_MSG:
default:
return;/*stop dissection*/
}
}
}
