/* $NetBSD: linux_socketcall.c,v 1.48 2017/02/09 22:01:48 christos Exp $ */
/*-
* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_socketcall.c,v 1.48 2017/02/09 22:01:48 christos Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/device.h>
#include <sys/ktrace.h>
#include <sys/syscallargs.h>
#include <compat/sys/socket.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_ioctl.h>
#include <compat/linux/common/linux_socket.h>
#include <compat/linux/common/linux_socketcall.h>
#include <compat/linux/common/linux_sockio.h>
#include <compat/linux/linux_syscallargs.h>
#undef DPRINTF
#ifdef DEBUG_LINUX
#define DPRINTF(a) uprintf a
#else
#define DPRINTF(a)
#endif
/* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */
/* Not used on: alpha, amd64 */
/*
* This file contains the linux_socketcall() multiplexer. Arguments
* for the various socket calls are on the user stack. A pointer
* to them is the only thing that is passed. We copyin the arguments
* here so the individual functions can assume they are normal syscalls.
*/
/* The sizes of the arguments. Used for copyin. */
static const struct {
const char *name;
int argsize;
} linux_socketcall[LINUX_MAX_SOCKETCALL+1] = {
#define L(a) "linux/" a
{L("invalid"), -1}, /* 0 */
{L("socket"), sizeof(struct linux_sys_socket_args)}, /* 1 */
{L("bind"), sizeof(struct linux_sys_bind_args)}, /* 2 */
{L("connect"), sizeof(struct linux_sys_connect_args)}, /* 3 */
{L("listen"), sizeof(struct sys_listen_args)}, /* 4 */
{L("accept"), sizeof(struct linux_sys_accept_args)}, /* 5 */
{L("getsockname"),sizeof(struct linux_sys_getsockname_args)}, /* 6 */
{L("getpeername"),sizeof(struct linux_sys_getpeername_args)}, /* 7 */
{L("socketpair"),sizeof(struct linux_sys_socketpair_args)}, /* 8 */
{L("send"), sizeof(struct linux_sys_send_args)}, /* 9 */
{L("recv"), sizeof(struct linux_sys_recv_args)}, /* 10 */
{L("sendto"), sizeof(struct linux_sys_sendto_args)}, /* 11 */
{L("recvfrom"), sizeof(struct linux_sys_recvfrom_args)}, /* 12 */
{L("shutdown"), sizeof(struct sys_shutdown_args)}, /* 13 */
{L("setsockopt"),sizeof(struct linux_sys_setsockopt_args)}, /* 14 */
{L("getsockopt"),sizeof(struct linux_sys_getsockopt_args)}, /* 15 */
{L("sendmsg"), sizeof(struct linux_sys_sendmsg_args)}, /* 16 */
{L("recvmsg"), sizeof(struct linux_sys_recvmsg_args)}, /* 17 */
{L("accept4"), sizeof(struct linux_sys_accept4_args)}, /* 18 */
#undef L
};
/*
* Entry point to all Linux socket calls. Just check which call to
* make and take appropriate action.
*/
int
linux_sys_socketcall(struct lwp *l, const struct linux_sys_socketcall_args *uap, register_t *retval)
{
/* {
syscallarg(int) what;
syscallarg(void *) args;
} */
struct linux_socketcall_dummy_args lda;
int error;
if (SCARG(uap, what) <= 0 || SCARG(uap, what) > LINUX_MAX_SOCKETCALL)
return ENOSYS;
if ((error = copyin(SCARG(uap, args), &lda,
linux_socketcall[SCARG(uap, what)].argsize))) {
DPRINTF(("copyin for %s failed %d\n",
linux_socketcall[SCARG(uap, what)].name, error));
return error;
}
ktrkuser(linux_socketcall[SCARG(uap, what)].name, &lda,
linux_socketcall[SCARG(uap, what)].argsize);
#ifdef DEBUG_LINUX
/* dump the passed argument data */
{
DPRINTF(("linux_socketcall('%s'): ",
linux_socketcall[SCARG(uap, what)].name));
if (SCARG(uap, what) == LINUX_SYS_SOCKET) {
DPRINTF(("[dom %d type %d proto %d]\n",
lda.dummy_ints[0],
lda.dummy_ints[1],
lda.dummy_ints[2]));
} else {
int i, sz;
u_int8_t *data = (u_int8_t *)&lda.dummy_ints[1];
sz = linux_socketcall[SCARG(uap, what)].argsize
- sizeof(lda.dummy_ints[0]);
DPRINTF(("socket %d [", lda.dummy_ints[0]));
for(i=0; i < sz; i++)
DPRINTF(("%02x ", data[i]));
DPRINTF(("]\n"));
}
}
#endif
switch (SCARG(uap, what)) {
case LINUX_SYS_SOCKET:
error = linux_sys_socket(l, (void *)&lda, retval);
break;
case LINUX_SYS_BIND:
error = linux_sys_bind(l, (void *)&lda, retval);
break;
case LINUX_SYS_CONNECT:
error = linux_sys_connect(l, (void *)&lda, retval);
break;
case LINUX_SYS_LISTEN:
error = sys_listen(l, (void *)&lda, retval);
break;
case LINUX_SYS_ACCEPT:
error = linux_sys_accept(l, (void *)&lda, retval);
break;
case LINUX_SYS_GETSOCKNAME:
error = linux_sys_getsockname(l, (void *)&lda, retval);
break;
case LINUX_SYS_GETPEERNAME:
error = linux_sys_getpeername(l, (void *)&lda, retval);
break;
case LINUX_SYS_SOCKETPAIR:
error = linux_sys_socketpair(l, (void *)&lda, retval);
break;
case LINUX_SYS_SEND:
error = linux_sys_send(l, (void *)&lda, retval);
break;
case LINUX_SYS_RECV:
error = linux_sys_recv(l, (void *)&lda, retval);
break;
case LINUX_SYS_SENDTO:
error = linux_sys_sendto(l, (void *)&lda, retval);
break;
case LINUX_SYS_RECVFROM:
error = linux_sys_recvfrom(l, (void *)&lda, retval);
break;
case LINUX_SYS_SHUTDOWN:
error = sys_shutdown(l, (void *)&lda, retval);
break;
case LINUX_SYS_SETSOCKOPT:
error = linux_sys_setsockopt(l, (void *)&lda, retval);
break;
case LINUX_SYS_GETSOCKOPT:
error = linux_sys_getsockopt(l, (void *)&lda, retval);
break;
case LINUX_SYS_SENDMSG:
error = linux_sys_sendmsg(l, (void *)&lda, retval);
break;
case LINUX_SYS_RECVMSG:
error = linux_sys_recvmsg(l, (void *)&lda, retval);
break;
case LINUX_SYS_ACCEPT4:
error = linux_sys_accept4(l, (void *)&lda, retval);
break;
case LINUX_SYS_RECVMMSG:
error = linux_sys_recvmmsg(l, (void *)&lda, retval);
break;
case LINUX_SYS_SENDMMSG:
error = linux_sys_sendmmsg(l, (void *)&lda, retval);
break;
default:
error = ENOSYS;
break;
}
DPRINTF(("sys_%s() = %d\n", linux_socketcall[SCARG(uap, what)].name,
error));
return error;
}