*zlib* available by default, and has helper API *snappy* is optional, and needs manual deflating: #ifdef HAVE_SNAPPY case MONGO_COMPRESSOR_SNAPPY: { .. } break; #endif Decompression creates a new *data source*: if (ret == SNAPPY_OK) { compressed_tvb = tvb_new_child_real_data(tvb, decomp_buf, orig_size, orig_size); *add_new_data_source* (pinfo, compressed_tvb, "Decompressed Data"); Re-run dissector on decompressed data: dissect_opcode_types(compressed_tvb, pinfo, 0, tree, opcode, *effective_opcode*);