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10c198827d
This fixes a deadlock abort() when SOCKET_WRAPPER_KEEP_PCAP=1 is used. BUG: https://bugzilla.samba.org/show_bug.cgi?id=14640 Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Andreas Schneider <asn@samba.org> Autobuild-User(master): Stefan Metzmacher <metze@samba.org> Autobuild-Date(master): Wed Mar 17 23:53:04 UTC 2021 on sn-devel-184
90 lines
3.5 KiB
C
90 lines
3.5 KiB
C
/*
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* BSD 3-Clause License
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*
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* Copyright (c) 2005-2008, Jelmer Vernooij <jelmer@samba.org>
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* Copyright (c) 2006-2021, Stefan Metzmacher <metze@samba.org>
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* Copyright (c) 2013-2021, Andreas Schneider <asn@samba.org>
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* Copyright (c) 2014-2017, Michael Adam <obnox@samba.org>
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* Copyright (c) 2016-2018, Anoop C S <anoopcs@redhat.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __SOCKET_WRAPPER_H__
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#define __SOCKET_WRAPPER_H__ 1
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#include <stdbool.h>
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/*
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Socket wrapper advanced helpers.
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Applications with the need to alter their behaviour when
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socket wrapper is active, can link use these functions.
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By default it's required for applications to use any of these
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functions as libsocket_wrapper.so is injected at runtime via
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LD_PRELOAD.
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Applications using these functions should link against
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libsocket_wrapper_noop.so by using -lsocket_wrapper_noop,
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or implement their own noop stubs.
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*/
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/*
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* This returns true when socket wrapper is actively in use.
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*/
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bool socket_wrapper_enabled(void);
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/*
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* This allows socket_wrapper aware applications to
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* indicate that the given fd does not belong to
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* an inet socket.
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*
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* socket_wrapper may not be able to intercept the __close_nocancel()
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* syscall made from within libc.so. As result it's possible
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* that the in memory meta date of socket_wrapper references
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* stale file descriptors, which are already reused for unrelated
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* kernel objects, e.g. files, directories, ...
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*
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* Socket wrapper already intercepts a lot of unrelated
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* functions like eventfd(), timerfd_create(), ... in order
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* to remove stale meta data for the returned fd, but
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* it will never be able to handle all possible syscalls.
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*
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* socket_wrapper_indicate_no_inet_fd() gives applications a way
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* to do the same, explicitly without waiting for new syscalls to
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* be added to libsocket_wrapper.so.
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*
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* This is a no-op if socket_wrapper is not in use or
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* if the there is no in memory meta data for the given fd.
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*/
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void socket_wrapper_indicate_no_inet_fd(int fd);
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#endif /* __SOCKET_WRAPPER_H__ */
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