From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- third_party/socket_wrapper/socket_wrapper.h | 89 +++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 third_party/socket_wrapper/socket_wrapper.h (limited to 'third_party/socket_wrapper/socket_wrapper.h') diff --git a/third_party/socket_wrapper/socket_wrapper.h b/third_party/socket_wrapper/socket_wrapper.h new file mode 100644 index 0000000..3ec5031 --- /dev/null +++ b/third_party/socket_wrapper/socket_wrapper.h @@ -0,0 +1,89 @@ +/* + * BSD 3-Clause License + * + * Copyright (c) 2005-2008, Jelmer Vernooij + * Copyright (c) 2006-2021, Stefan Metzmacher + * Copyright (c) 2013-2021, Andreas Schneider + * Copyright (c) 2014-2017, Michael Adam + * Copyright (c) 2016-2018, Anoop C S + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the author nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef __SOCKET_WRAPPER_H__ +#define __SOCKET_WRAPPER_H__ 1 + +#include + +/* + Socket wrapper advanced helpers. + + Applications with the need to alter their behaviour when + socket wrapper is active, can link use these functions. + + By default it's required for applications to use any of these + functions as libsocket_wrapper.so is injected at runtime via + LD_PRELOAD. + + Applications using these functions should link against + libsocket_wrapper_noop.so by using -lsocket_wrapper_noop, + or implement their own noop stubs. +*/ + +/* + * This returns true when socket wrapper is actively in use. + */ +bool socket_wrapper_enabled(void); + +/* + * This allows socket_wrapper aware applications to + * indicate that the given fd does not belong to + * an inet socket. + * + * socket_wrapper may not be able to intercept the __close_nocancel() + * syscall made from within libc.so. As result it's possible + * that the in memory meta date of socket_wrapper references + * stale file descriptors, which are already reused for unrelated + * kernel objects, e.g. files, directories, ... + * + * Socket wrapper already intercepts a lot of unrelated + * functions like eventfd(), timerfd_create(), ... in order + * to remove stale meta data for the returned fd, but + * it will never be able to handle all possible syscalls. + * + * socket_wrapper_indicate_no_inet_fd() gives applications a way + * to do the same, explicitly without waiting for new syscalls to + * be added to libsocket_wrapper.so. + * + * This is a no-op if socket_wrapper is not in use or + * if the there is no in memory meta data for the given fd. + */ +void socket_wrapper_indicate_no_inet_fd(int fd); + +#endif /* __SOCKET_WRAPPER_H__ */ -- cgit v1.2.3