From efd2967e060a3a7ca3de589a23511bb38151ed8b Mon Sep 17 00:00:00 2001 From: Stefan Metzmacher Date: Wed, 24 Feb 2021 12:45:26 +0100 Subject: swrap: introduce a socket_wrapper_noop.so and socket_wrapper.h to provide noop stubs Applications with the need to call socket_wrapper_enabled() should link against -lsocket_wrapper_noop in order to resolve the symbol at link time. BUG: https://bugzilla.samba.org/show_bug.cgi?id=14640 Signed-off-by: Stefan Metzmacher Reviewed-by: Andreas Schneider --- src/socket_wrapper.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 src/socket_wrapper.h (limited to 'src/socket_wrapper.h') diff --git a/src/socket_wrapper.h b/src/socket_wrapper.h new file mode 100644 index 0000000..f1a97e8 --- /dev/null +++ b/src/socket_wrapper.h @@ -0,0 +1,64 @@ +/* + * 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); + +#endif /* __SOCKET_WRAPPER_H__ */ -- cgit