使用cmsg公共库解析cmsg信息，对业务层提供获取cmsg句柄的接口

platform/include/internal/platform.h

@@ -75,6 +75,7 @@ struct tfe_stream_private
 
 	struct tfe_proxy * proxy_ref;
 	struct tfe_thread_ctx * thread_ref;
+	struct tfe_cmsg * cmsg;
 
 	enum tfe_stream_proto session_type;
 	struct tfe_stream_write_ctx * w_ctx_upstream;