/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the * License may not be used to create, or enable the creation or * redistribution of, unlawful or unlicensed copies of an Apple operating * system, or to circumvent, violate, or enable the circumvention or * violation of, any terms of an Apple operating system software license * agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ */ /* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)unpcb.h 8.1 (Berkeley) 6/2/93 */ #ifndef _SYS_UNPCB_H_ #define _SYS_UNPCB_H_ #include <sys/appleapiopts.h> #include <sys/queue.h> #include <sys/un.h> #include <sys/ucred.h> /* * Protocol control block for an active * instance of a UNIX internal protocol. * * A socket may be associated with an vnode in the * file system. If so, the unp_vnode pointer holds * a reference count to this vnode, which should be irele'd * when the socket goes away. * * A socket may be connected to another socket, in which * case the control block of the socket to which it is connected * is given by unp_conn. * * A socket may be referenced by a number of sockets (e.g. several * sockets may be connected to a datagram socket.) These sockets * are in a linked list starting with unp_refs, linked through * unp_nextref and null-terminated. Note that a socket may be referenced * by a number of other sockets and may also reference a socket (not * necessarily one which is referencing it). This generates * the need for unp_refs and unp_nextref to be separate fields. * * Stream sockets keep copies of receive sockbuf sb_cc and sb_mbcnt * so that changes in the sockbuf may be computed to modify * back pressure on the sender accordingly. */ typedef u_quad_t unp_gen_t; #ifdef PRIVATE LIST_HEAD(unp_head, unpcb); #ifdef KERNEL #define sotounpcb(so) ((struct unpcb *)((so)->so_pcb)) struct unpcb { LIST_ENTRY(unpcb) unp_link; /* glue on list of all PCBs */ struct socket *unp_socket; /* pointer back to socket */ struct vnode *unp_vnode; /* if associated with file */ ino_t unp_ino; /* fake inode number */ struct unpcb *unp_conn; /* control block of connected socket */ struct unp_head unp_refs; /* referencing socket linked list */ LIST_ENTRY(unpcb) unp_reflink; /* link in unp_refs list */ struct sockaddr_un *unp_addr; /* bound address of socket */ int unp_cc; /* copy of rcv.sb_cc */ int unp_mbcnt; /* copy of rcv.sb_mbcnt */ unp_gen_t unp_gencnt; /* generation count of this instance */ int unp_flags; /* flags */ struct xucred unp_peercred; /* peer credentials, if applicable */ }; #endif /* KERNEL */ /* * Flags in unp_flags. * * UNP_HAVEPC - indicates that the unp_peercred member is filled in * and is really the credentials of the connected peer. This is used * to determine whether the contents should be sent to the user or * not. * * UNP_HAVEPCCACHED - indicates that the unp_peercred member is filled * in, but does *not* contain the credentials of the connected peer * (there may not even be a peer). This is set in unp_listen() when * it fills in unp_peercred for later consumption by unp_connect(). */ #define UNP_HAVEPC 0x001 #define UNP_HAVEPCCACHED 0x002 #ifdef KERNEL struct unpcb_compat { #else /* KERNEL */ #define unpcb_compat unpcb struct unpcb { #endif /* KERNEL */ LIST_ENTRY(unpcb_compat) unp_link; /* glue on list of all PCBs */ struct socket *unp_socket; /* pointer back to socket */ struct vnode *unp_vnode; /* if associated with file */ ino_t unp_ino; /* fake inode number */ struct unpcb_compat *unp_conn; /* control block of connected socket */ struct unp_head unp_refs; /* referencing socket linked list */ LIST_ENTRY(unpcb_compat) unp_reflink; /* link in unp_refs list */ struct sockaddr_un *unp_addr; /* bound address of socket */ int unp_cc; /* copy of rcv.sb_cc */ int unp_mbcnt; /* copy of rcv.sb_mbcnt */ unp_gen_t unp_gencnt; /* generation count of this instance */ }; /* Hack alert -- this structure depends on <sys/socketvar.h>. */ #ifdef _SYS_SOCKETVAR_H_ struct xunpcb { size_t xu_len; /* length of this structure */ struct unpcb_compat *xu_unpp; /* to help netstat, fstat */ struct unpcb_compat xu_unp; /* our information */ union { struct sockaddr_un xuu_addr; /* our bound address */ char xu_dummy1[256]; } xu_au; #define xu_addr xu_au.xuu_addr union { struct sockaddr_un xuu_caddr; /* their bound address */ char xu_dummy2[256]; } xu_cau; #define xu_caddr xu_cau.xuu_caddr struct xsocket xu_socket; u_quad_t xu_alignment_hack; }; #endif /* _SYS_SOCKETVAR_H_ */ #endif /* PRIVATE */ struct xunpgen { size_t xug_len; u_int xug_count; unp_gen_t xug_gen; so_gen_t xug_sogen; }; #endif /* _SYS_UNPCB_H_ */