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*/ } } }