4ac21b4f09
- Move cr_canseeinpcb to sys/netinet/in_prot.c in order to separate the INET and INET6-specific code from the rest of the prot code (It is only used by the network stack, so it makes sense for it to live with the other network stack code.) - Move cr_canseeinpcb prototype from sys/systm.h to netinet/in_systm.h - Rename cr_seeotheruids to cr_canseeotheruids and cr_seeothergids to cr_canseeothergids, make them non-static, and add prototypes (so they can be seen/called by in_prot.c functions.) - Remove sw_csum variable from ip6_forward in ip6_forward.c, as it is an unused variable. Reviewed by: gnn, jtl Approved by: sjg (mentor) Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D2901
92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1990, 1991, 1993
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* The Regents of the University of California.
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* (c) UNIX System Laboratories, Inc.
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* Copyright (c) 2000-2001 Robert N. M. Watson.
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* All rights reserved.
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*
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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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* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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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* @(#)kern_prot.c 8.6 (Berkeley) 1/21/94
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*/
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/*
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* System calls related to processes and protection
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/jail.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_systm.h>
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#include <security/audit/audit.h>
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#include <security/mac/mac_framework.h>
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/*-
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* Determine whether the subject represented by cred can "see" a socket.
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* Returns: 0 for permitted, ENOENT otherwise.
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*/
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int
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cr_canseeinpcb(struct ucred *cred, struct inpcb *inp)
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{
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int error;
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error = prison_check(cred, inp->inp_cred);
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if (error)
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return (ENOENT);
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#ifdef MAC
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INP_LOCK_ASSERT(inp);
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error = mac_inpcb_check_visible(cred, inp);
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if (error)
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return (error);
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#endif
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if (cr_canseeotheruids(cred, inp->inp_cred))
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return (ENOENT);
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if (cr_canseeothergids(cred, inp->inp_cred))
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return (ENOENT);
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return (0);
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}
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