NetBSD-5.0.2/sys/compat/svr4_32/svr4_32_socket.c
/* $NetBSD: svr4_32_socket.c,v 1.12 2008/04/28 20:23:46 martin Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* In SVR4 unix domain sockets are referenced sometimes
* (in putmsg(2) for example) as a [device, inode] pair instead of a pathname.
* Since there is no iname() routine in the kernel, and we need access to
* a mapping from inode to pathname, we keep our own table. This is a simple
* linked list that contains the pathname, the [device, inode] pair, the
* file corresponding to that socket and the process. When the
* socket gets closed we remove the item from the list. The list gets loaded
* every time a stat(2) call finds a socket.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: svr4_32_socket.c,v 1.12 2008/04/28 20:23:46 martin Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/mbuf.h>
#include <sys/file.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syscallargs.h>
#include <sys/un.h>
#include <sys/stat.h>
#include <compat/svr4_32/svr4_32_types.h>
#include <compat/svr4_32/svr4_32_util.h>
#include <compat/svr4_32/svr4_32_socket.h>
#include <compat/svr4_32/svr4_32_signal.h>
#include <compat/svr4/svr4_sockmod.h>
#include <compat/svr4_32/svr4_32_lwp.h>
#include <compat/svr4_32/svr4_32_ucontext.h>
#include <compat/svr4_32/svr4_32_syscallargs.h>
struct svr4_sockcache_entry {
struct proc *p; /* Process for the socket */
void *cookie; /* Internal cookie used for matching */
struct sockaddr_un sock;/* Pathname for the socket */
dev_t dev; /* Device where the socket lives on */
svr4_ino_t ino; /* Inode where the socket lives on */
TAILQ_ENTRY(svr4_sockcache_entry) entries;
};
#if 0
static TAILQ_HEAD(svr4_sockcache_head, svr4_sockcache_entry) svr4_head;
static int initialized = 0;
struct sockaddr_un *
svr4_32_find_socket(struct proc *p, struct file *fp, dev_t dev, svr4_ino_t ino)
{
struct svr4_sockcache_entry *e;
void *cookie = ((struct socket *) fp->f_data)->so_internal;
if (!initialized) {
DPRINTF(("svr4_32_find_socket: uninitialized [%p,%d,%d]\n",
p, dev, ino));
TAILQ_INIT(&svr4_head);
initialized = 1;
return NULL;
}
DPRINTF(("svr4_32_find_socket: [%p,%d,%d]: ", p, dev, ino));
for (e = svr4_head.tqh_first; e != NULL; e = e->entries.tqe_next)
if (e->p == p && e->dev == dev && e->ino == ino) {
#ifdef DIAGNOSTIC
if (e->cookie != NULL && e->cookie != cookie)
panic("svr4_32 socket cookie mismatch");
#endif
e->cookie = cookie;
DPRINTF(("%s\n", e->sock.sun_path));
return &e->sock;
}
DPRINTF(("not found\n"));
return NULL;
}
#endif
#if 0
void
svr4_32_delete_socket(struct proc *p, struct file *fp)
{
struct svr4_sockcache_entry *e;
void *cookie = ((struct socket *) fp->f_data)->so_internal;
if (!initialized) {
TAILQ_INIT(&svr4_head);
initialized = 1;
return;
}
for (e = svr4_head.tqh_first; e != NULL; e = e->entries.tqe_next)
if (e->p == p && e->cookie == cookie) {
TAILQ_REMOVE(&svr4_head, e, entries);
DPRINTF(("svr4_delete_socket: %s [%p,%d,%d]\n",
e->sock.sun_path, p, e->dev, e->ino));
free(e, M_TEMP);
return;
}
}
#endif
#if 0
int
svr4_32_add_socket(struct proc *p, const char *path, struct stat *st)
{
struct svr4_sockcache_entry *e;
size_t len;
int error;
if (!initialized) {
TAILQ_INIT(&svr4_head);
initialized = 1;
}
e = malloc(sizeof(*e), M_TEMP, M_WAITOK);
e->cookie = NULL;
e->dev = st->st_dev;
e->ino = st->st_ino;
e->p = p;
if ((error = copyinstr(path, e->sock.sun_path,
sizeof(e->sock.sun_path), &len)) != 0) {
DPRINTF(("svr4_32_add_socket: copyinstr failed %d\n", error));
free(e, M_TEMP);
return error;
}
e->sock.sun_family = AF_LOCAL;
e->sock.sun_len = len;
TAILQ_INSERT_HEAD(&svr4_head, e, entries);
DPRINTF(("svr4_32_add_socket: %s [%p,%d,%d]\n", e->sock.sun_path,
p, e->dev, e->ino));
return 0;
}
#endif
int
svr4_32_sys_socket(struct lwp *l, const struct svr4_32_sys_socket_args *uap, register_t *retval)
{
struct sys___socket30_args uap0;
/*
* We need to use a separate args since native has a different
* padding.
*/
SCARG(&uap0, domain) = SCARG(uap, domain);
SCARG(&uap0, protocol) = SCARG(uap, protocol);
switch (SCARG(uap, type)) {
case SVR4_SOCK_DGRAM:
SCARG(&uap0, type) = SOCK_DGRAM;
break;
case SVR4_SOCK_STREAM:
SCARG(&uap0, type) = SOCK_STREAM;
break;
case SVR4_SOCK_RAW:
SCARG(&uap0, type) = SOCK_RAW;
break;
case SVR4_SOCK_RDM:
SCARG(&uap0, type) = SOCK_RDM;
break;
case SVR4_SOCK_SEQPACKET:
SCARG(&uap0, type) = SOCK_SEQPACKET;
break;
default:
return EINVAL;
}
return sys___socket30(l, &uap0, retval);
}