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bd1da0a002
Change the nvlist_recv() function to take additional argument that specifies flags expected on the received nvlist. Receiving a nvlist with different set of flags than the ones we expect might lead to undefined behaviour, which might be potentially dangerous. Update consumers of this and related functions and update the tests. Approved by: pjd (mentor) Update man page for nvlist_unpack, nvlist_recv, nvlist_xfer, cap_recv_nvlist and cap_xfer_nvlist. Reviewed by: AllanJude Approved by: pjd (mentor)
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*-
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* Copyright (c) 2012-2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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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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* 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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* 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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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* $FreeBSD$
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*/
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#ifndef _LIBCAPSICUM_H_
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#define _LIBCAPSICUM_H_
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#ifndef _NVLIST_T_DECLARED
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#define _NVLIST_T_DECLARED
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struct nvlist;
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typedef struct nvlist nvlist_t;
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#endif
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#ifndef _CAP_CHANNEL_T_DECLARED
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#define _CAP_CHANNEL_T_DECLARED
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struct cap_channel;
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typedef struct cap_channel cap_channel_t;
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#endif
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/*
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* The function opens unrestricted communication channel to Casper.
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*/
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cap_channel_t *cap_init(void);
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/*
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* The function creates cap_channel_t based on the given socket.
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*/
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cap_channel_t *cap_wrap(int sock);
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/*
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* The function returns communication socket and frees cap_channel_t.
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*/
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int cap_unwrap(cap_channel_t *chan);
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/*
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* The function clones the given capability.
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*/
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cap_channel_t *cap_clone(const cap_channel_t *chan);
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/*
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* The function closes the given capability.
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*/
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void cap_close(cap_channel_t *chan);
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/*
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* The function returns socket descriptor associated with the given
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* cap_channel_t for use with select(2)/kqueue(2)/etc.
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*/
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int cap_sock(const cap_channel_t *chan);
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/*
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* The function limits the given capability.
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* It always destroys 'limits' on return.
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*/
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int cap_limit_set(const cap_channel_t *chan, nvlist_t *limits);
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/*
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* The function returns current limits of the given capability.
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*/
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int cap_limit_get(const cap_channel_t *chan, nvlist_t **limitsp);
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#ifdef TODO
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/*
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* The function registers a service within provided Casper's capability.
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* It will run with the same privileges the process has at the time of
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* calling this function.
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*/
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int cap_service_register(cap_channel_t *chan, const char *name,
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cap_func_t *func);
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#endif
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/*
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* Function sends nvlist over the given capability.
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*/
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int cap_send_nvlist(const cap_channel_t *chan, const nvlist_t *nvl);
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/*
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* Function receives nvlist over the given capability.
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*/
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nvlist_t *cap_recv_nvlist(const cap_channel_t *chan, int flags);
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/*
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* Function sends the given nvlist, destroys it and receives new nvlist in
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* response over the given capability.
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*/
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nvlist_t *cap_xfer_nvlist(const cap_channel_t *chan, nvlist_t *nvl, int flags);
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#endif /* !_LIBCAPSICUM_H_ */
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