diff options
Diffstat (limited to 'sys/sys/unpcb.h')
| -rw-r--r-- | sys/sys/unpcb.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/sys/sys/unpcb.h b/sys/sys/unpcb.h new file mode 100644 index 0000000..daa22a1 --- /dev/null +++ b/sys/sys/unpcb.h @@ -0,0 +1,111 @@ +/* $OpenBSD: unpcb.h,v 1.17 2019/07/15 12:28:06 bluhm Exp $ */ +/* $NetBSD: unpcb.h,v 1.6 1994/06/29 06:46:08 cgd Exp $ */ + +/* + * 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. 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 + */ + +/* + * 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 vrele'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. + */ + +struct unpcb { + struct socket *unp_socket; /* pointer back to socket */ + struct vnode *unp_vnode; /* if associated with file */ + struct file *unp_file; /* backpointer for unp_gc() */ + struct unpcb *unp_conn; /* control block of connected socket */ + ino_t unp_ino; /* fake inode number */ + SLIST_HEAD(,unpcb) unp_refs; /* referencing socket linked list */ + SLIST_ENTRY(unpcb) unp_nextref; /* link in unp_refs list */ + struct mbuf *unp_addr; /* bound address of socket */ + long unp_msgcount; /* references from socket rcv buf */ + int unp_flags; /* this unpcb contains peer eids */ + struct sockpeercred unp_connid;/* id of peer process */ + struct timespec unp_ctime; /* holds creation time */ + LIST_ENTRY(unpcb) unp_link; /* link in per-AF list of sockets */ +}; + +/* + * flag bits in unp_flags + */ +#define UNP_FEIDS 0x01 /* unp_connid contains information */ +#define UNP_FEIDSBIND 0x02 /* unp_connid was set by a bind */ +#define UNP_GCMARK 0x04 /* mark during unp_gc() */ +#define UNP_GCDEFER 0x08 /* ref'd, but not marked in this pass */ +#define UNP_GCDEAD 0x10 /* unref'd in this pass */ + +#define sotounpcb(so) ((struct unpcb *)((so)->so_pcb)) + +#ifdef _KERNEL +struct fdpass { + struct file *fp; + int flags; +}; + +int uipc_usrreq(struct socket *, int , struct mbuf *, + struct mbuf *, struct mbuf *, struct proc *); +int uipc_attach(struct socket *, int); +int uipc_detach(struct socket *); + +void unp_init(void); +int unp_bind(struct unpcb *, struct mbuf *, struct proc *); +int unp_connect(struct socket *, struct mbuf *, struct proc *); +int unp_connect2(struct socket *, struct socket *); +void unp_detach(struct unpcb *); +void unp_disconnect(struct unpcb *); +void unp_drop(struct unpcb *, int); +void unp_gc(void *); +void unp_shutdown(struct unpcb *); +int unp_externalize(struct mbuf *, socklen_t, int); +int unp_internalize(struct mbuf *, struct proc *); +void unp_dispose(struct mbuf *); +#endif /* _KERNEL */ |