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260 lines
10 KiB
C
260 lines
10 KiB
C
/*
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* Copyright (c) 2008-2020 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. 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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* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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* @(#)unpcb.h 8.1 (Berkeley) 6/2/93
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*/
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#ifndef _SYS_UNPCB_H_
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#define _SYS_UNPCB_H_
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#include <sys/appleapiopts.h>
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#include <sys/queue.h>
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#include <sys/un.h>
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#include <sys/ucred.h>
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#include <sys/socketvar.h>
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#if !KERNEL && PRIVATE
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#include <TargetConditionals.h>
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#endif
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/*
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* Protocol control block for an active
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* instance of a UNIX internal protocol.
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*
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* A socket may be associated with an vnode in the
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* file system. If so, the unp_vnode pointer holds
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* a reference count to this vnode, which should be irele'd
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* when the socket goes away.
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*
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* A socket may be connected to another socket, in which
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* case the control block of the socket to which it is connected
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* is given by unp_conn.
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*
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* A socket may be referenced by a number of sockets (e.g. several
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* sockets may be connected to a datagram socket.) These sockets
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* are in a linked list starting with unp_refs, linked through
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* unp_nextref and null-terminated. Note that a socket may be referenced
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* by a number of other sockets and may also reference a socket (not
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* necessarily one which is referencing it). This generates
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* the need for unp_refs and unp_nextref to be separate fields.
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*
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* Stream sockets keep copies of receive sockbuf sb_cc and sb_mbcnt
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* so that changes in the sockbuf may be computed to modify
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* back pressure on the sender accordingly.
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*/
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typedef u_quad_t unp_gen_t;
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#if defined(__LP64__)
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struct _unpcb_list_entry {
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u_int32_t le_next;
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u_int32_t le_prev;
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};
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#define _UCPCB_LIST_HEAD(name, type) \
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struct name { \
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u_int32_t lh_first; \
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};
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#define _UNPCB_LIST_ENTRY(x) struct _unpcb_list_entry
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#define _UNPCB_PTR(x) u_int32_t
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#else
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#define _UCPCB_LIST_HEAD(name, type) LIST_HEAD(name, type)
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#define _UNPCB_LIST_ENTRY(x) LIST_ENTRY(x)
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#define _UNPCB_PTR(x) x
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#endif
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#ifdef PRIVATE
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#ifndef KERNEL
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_UCPCB_LIST_HEAD(unp_head, unpcb);
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#else
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LIST_HEAD(unp_head, unpcb);
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#define sotounpcb(so) ((struct unpcb *)((so)->so_pcb))
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struct unpcb {
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LIST_ENTRY(unpcb) unp_link; /* glue on list of all PCBs */
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struct socket *unp_socket; /* pointer back to socket */
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struct vnode *unp_vnode; /* if associated with file */
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ino_t unp_ino; /* fake inode number */
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struct unpcb *unp_conn; /* control block of connected socket */
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struct unp_head unp_refs; /* referencing socket linked list */
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LIST_ENTRY(unpcb) unp_reflink; /* link in unp_refs list */
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struct sockaddr_un *unp_addr; /* bound address of socket */
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int unp_cc; /* copy of rcv.sb_cc */
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int unp_mbcnt; /* copy of rcv.sb_mbcnt */
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unp_gen_t unp_gencnt; /* generation count of this instance */
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int unp_flags; /* flags */
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struct xucred unp_peercred; /* peer credentials, if applicable */
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decl_lck_mtx_data(, unp_mtx); /* per unpcb lock */
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int rw_thrcount; /* disconnect should wait for this count to become zero */
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};
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#endif /* KERNEL */
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/*
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* Flags in unp_flags.
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*
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* UNP_HAVEPC - indicates that the unp_peercred member is filled in
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* and is really the credentials of the connected peer. This is used
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* to determine whether the contents should be sent to the user or
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* not.
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*
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* UNP_HAVEPCCACHED - indicates that the unp_peercred member is filled
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* in, but does *not* contain the credentials of the connected peer
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* (there may not even be a peer). This is set in unp_listen() when
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* it fills in unp_peercred for later consumption by unp_connect().
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*/
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#define UNP_HAVEPC 0x0001
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#define UNP_HAVEPCCACHED 0x0002
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#define UNP_DONTDISCONNECT 0x0004
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#define UNP_TRACE_MDNS 0x1000
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#ifdef KERNEL
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struct unpcb_compat {
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#else /* KERNEL */
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#define unpcb_compat unpcb
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struct unpcb {
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#endif /* KERNEL */
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_UNPCB_LIST_ENTRY(unpcb_compat) unp_link; /* glue on list of all PCBs */
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_UNPCB_PTR(struct socket *) unp_socket; /* pointer back to socket */
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_UNPCB_PTR(struct vnode *) unp_vnode; /* if associated with file */
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u_int32_t unp_ino; /* fake inode number */
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_UNPCB_PTR(struct unpcb_compat *) unp_conn; /* control block of connected socket */
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#if defined(KERNEL)
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u_int32_t unp_refs;
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#else
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struct unp_head unp_refs; /* referencing socket linked list */
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#endif
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_UNPCB_LIST_ENTRY(unpcb_compat) unp_reflink; /* link in unp_refs list */
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_UNPCB_PTR(struct sockaddr_un *) unp_addr; /* bound address of socket */
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int unp_cc; /* copy of rcv.sb_cc */
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int unp_mbcnt; /* copy of rcv.sb_mbcnt */
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unp_gen_t unp_gencnt; /* generation count of this instance */
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};
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/* Hack alert -- this structure depends on <sys/socketvar.h>. */
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#ifdef _SYS_SOCKETVAR_H_
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#pragma pack(4)
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struct xunpcb {
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u_int32_t xu_len; /* length of this structure */
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_UNPCB_PTR(struct unpcb_compat *) xu_unpp; /* to help netstat, fstat */
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struct unpcb_compat xu_unp; /* our information */
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union {
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struct sockaddr_un xuu_addr; /* our bound address */
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char xu_dummy1[256];
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} xu_au;
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#define xu_addr xu_au.xuu_addr
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union {
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struct sockaddr_un xuu_caddr; /* their bound address */
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char xu_dummy2[256];
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} xu_cau;
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#define xu_caddr xu_cau.xuu_caddr
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struct xsocket xu_socket;
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u_quad_t xu_alignment_hack;
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};
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#if XNU_TARGET_OS_OSX || KERNEL || !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
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struct xunpcb64_list_entry {
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u_int64_t le_next;
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u_int64_t le_prev;
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};
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struct xunpcb64 {
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u_int32_t xu_len; /* length of this structure */
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u_int64_t xu_unpp; /* to help netstat, fstat */
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struct xunpcb64_list_entry xunp_link; /* glue on list of all PCBs */
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u_int64_t xunp_socket; /* pointer back to socket */
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u_int64_t xunp_vnode; /* if associated with file */
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u_int64_t xunp_ino; /* fake inode number */
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u_int64_t xunp_conn; /* control block of connected socket */
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u_int64_t xunp_refs; /* referencing socket linked list */
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struct xunpcb64_list_entry xunp_reflink; /* link in unp_refs list */
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int xunp_cc; /* copy of rcv.sb_cc */
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int xunp_mbcnt; /* copy of rcv.sb_mbcnt */
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unp_gen_t xunp_gencnt; /* generation count of this instance */
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int xunp_flags; /* flags */
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union {
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struct sockaddr_un xuu_addr;
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char xu_dummy1[256];
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} xu_au; /* our bound address */
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#define xunp_addr xu_au.xuu_addr
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union {
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struct sockaddr_un xuu_caddr;
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char xu_dummy2[256];
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} xu_cau; /* their bound address */
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#define xunp_caddr xu_cau.xuu_caddr
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struct xsocket64 xu_socket;
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};
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#endif /* XNU_TARGET_OS_OSX || KERNEL || !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) */
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#pragma pack()
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#endif /* _SYS_SOCKETVAR_H_ */
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#endif /* PRIVATE */
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struct xunpgen {
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u_int32_t xug_len;
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u_int xug_count;
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unp_gen_t xug_gen;
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so_gen_t xug_sogen;
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};
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#endif /* _SYS_UNPCB_H_ */
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