1564 lines
35 KiB
C
1564 lines
35 KiB
C
/* $NetBSD: uipc_syscalls.c,v 1.181 2015/11/01 17:23:36 christos Exp $ */
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/*-
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* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1989, 1990, 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. 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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* @(#)uipc_syscalls.c 8.6 (Berkeley) 2/14/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uipc_syscalls.c,v 1.181 2015/11/01 17:23:36 christos Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_pipe.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/filedesc.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/buf.h>
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#define MBUFTYPES
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/signalvar.h>
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#include <sys/un.h>
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#include <sys/ktrace.h>
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#include <sys/event.h>
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#include <sys/atomic.h>
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#include <sys/kauth.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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/*
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* System call interface to the socket abstraction.
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*/
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extern const struct fileops socketops;
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static int sockargs_sb(struct sockaddr_big *, const void *, socklen_t);
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static int copyout_sockname_sb(struct sockaddr *, unsigned int *,
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int , struct sockaddr_big *);
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int
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sys___socket30(struct lwp *l, const struct sys___socket30_args *uap,
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register_t *retval)
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{
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/* {
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syscallarg(int) domain;
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syscallarg(int) type;
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syscallarg(int) protocol;
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} */
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int fd, error;
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error = fsocreate(SCARG(uap, domain), NULL, SCARG(uap, type),
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SCARG(uap, protocol), &fd);
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if (error == 0) {
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*retval = fd;
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}
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return error;
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}
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int
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sys_bind(struct lwp *l, const struct sys_bind_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) s;
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syscallarg(const struct sockaddr *) name;
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syscallarg(unsigned int) namelen;
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} */
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int error;
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struct sockaddr_big sb;
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error = sockargs_sb(&sb, SCARG(uap, name), SCARG(uap, namelen));
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if (error)
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return error;
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return do_sys_bind(l, SCARG(uap, s), (struct sockaddr *)&sb);
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}
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int
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do_sys_bind(struct lwp *l, int fd, struct sockaddr *nam)
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{
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struct socket *so;
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int error;
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if ((error = fd_getsock(fd, &so)) != 0)
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return error;
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error = sobind(so, nam, l);
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fd_putfile(fd);
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return error;
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}
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int
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sys_listen(struct lwp *l, const struct sys_listen_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) s;
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syscallarg(int) backlog;
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} */
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struct socket *so;
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int error;
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if ((error = fd_getsock(SCARG(uap, s), &so)) != 0)
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return (error);
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error = solisten(so, SCARG(uap, backlog), l);
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fd_putfile(SCARG(uap, s));
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return error;
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}
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int
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do_sys_accept(struct lwp *l, int sock, struct sockaddr *name,
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register_t *new_sock, const sigset_t *mask, int flags, int clrflags)
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{
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file_t *fp, *fp2;
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int error, fd;
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struct socket *so, *so2;
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short wakeup_state = 0;
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if ((fp = fd_getfile(sock)) == NULL)
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return EBADF;
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if (fp->f_type != DTYPE_SOCKET) {
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fd_putfile(sock);
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return ENOTSOCK;
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}
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if ((error = fd_allocfile(&fp2, &fd)) != 0) {
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fd_putfile(sock);
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return error;
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}
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*new_sock = fd;
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so = fp->f_socket;
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solock(so);
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if (__predict_false(mask))
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sigsuspendsetup(l, mask);
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if (!(so->so_proto->pr_flags & PR_LISTEN)) {
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error = EOPNOTSUPP;
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goto bad;
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}
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if ((so->so_options & SO_ACCEPTCONN) == 0) {
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error = EINVAL;
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goto bad;
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}
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if ((so->so_state & SS_NBIO) && so->so_qlen == 0) {
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error = EWOULDBLOCK;
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goto bad;
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}
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while (so->so_qlen == 0 && so->so_error == 0) {
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if (so->so_state & SS_CANTRCVMORE) {
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so->so_error = ECONNABORTED;
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break;
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}
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if (wakeup_state & SS_RESTARTSYS) {
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error = ERESTART;
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goto bad;
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}
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error = sowait(so, true, 0);
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if (error) {
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goto bad;
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}
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wakeup_state = so->so_state;
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}
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if (so->so_error) {
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error = so->so_error;
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so->so_error = 0;
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goto bad;
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}
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/* connection has been removed from the listen queue */
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KNOTE(&so->so_rcv.sb_sel.sel_klist, NOTE_SUBMIT);
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so2 = TAILQ_FIRST(&so->so_q);
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if (soqremque(so2, 1) == 0)
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panic("accept");
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fp2->f_type = DTYPE_SOCKET;
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fp2->f_flag = (fp->f_flag & ~clrflags) |
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((flags & SOCK_NONBLOCK) ? FNONBLOCK : 0)|
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((flags & SOCK_NOSIGPIPE) ? FNOSIGPIPE : 0);
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fp2->f_ops = &socketops;
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fp2->f_socket = so2;
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if (fp2->f_flag & FNONBLOCK)
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so2->so_state |= SS_NBIO;
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else
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so2->so_state &= ~SS_NBIO;
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error = soaccept(so2, name);
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so2->so_cred = kauth_cred_dup(so->so_cred);
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sounlock(so);
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if (error) {
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/* an error occurred, free the file descriptor and mbuf */
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mutex_enter(&fp2->f_lock);
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fp2->f_count++;
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mutex_exit(&fp2->f_lock);
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closef(fp2);
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fd_abort(curproc, NULL, fd);
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} else {
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fd_set_exclose(l, fd, (flags & SOCK_CLOEXEC) != 0);
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fd_affix(curproc, fp2, fd);
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}
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fd_putfile(sock);
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if (__predict_false(mask))
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sigsuspendteardown(l);
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return error;
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bad:
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sounlock(so);
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fd_putfile(sock);
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fd_abort(curproc, fp2, fd);
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if (__predict_false(mask))
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sigsuspendteardown(l);
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return error;
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}
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int
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sys_accept(struct lwp *l, const struct sys_accept_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) s;
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syscallarg(struct sockaddr *) name;
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syscallarg(unsigned int *) anamelen;
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} */
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int error, fd;
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struct sockaddr_big name;
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name.sb_len = UCHAR_MAX;
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error = do_sys_accept(l, SCARG(uap, s), (struct sockaddr *)&name,
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retval, NULL, 0, 0);
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if (error != 0)
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return error;
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error = copyout_sockname_sb(SCARG(uap, name), SCARG(uap, anamelen),
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MSG_LENUSRSPACE, &name);
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if (error != 0) {
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fd = (int)*retval;
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if (fd_getfile(fd) != NULL)
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(void)fd_close(fd);
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}
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return error;
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}
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int
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sys_paccept(struct lwp *l, const struct sys_paccept_args *uap,
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register_t *retval)
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{
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/* {
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syscallarg(int) s;
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syscallarg(struct sockaddr *) name;
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syscallarg(unsigned int *) anamelen;
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syscallarg(const sigset_t *) mask;
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syscallarg(int) flags;
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} */
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int error, fd;
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struct sockaddr_big name;
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sigset_t *mask, amask;
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if (SCARG(uap, mask) != NULL) {
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error = copyin(SCARG(uap, mask), &amask, sizeof(amask));
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if (error)
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return error;
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mask = &amask;
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} else
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mask = NULL;
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name.sb_len = UCHAR_MAX;
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error = do_sys_accept(l, SCARG(uap, s), (struct sockaddr *)&name,
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retval, mask, SCARG(uap, flags), FNONBLOCK);
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if (error != 0)
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return error;
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error = copyout_sockname_sb(SCARG(uap, name), SCARG(uap, anamelen),
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MSG_LENUSRSPACE, &name);
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if (error != 0) {
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fd = (int)*retval;
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if (fd_getfile(fd) != NULL)
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(void)fd_close(fd);
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}
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return error;
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}
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int
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sys_connect(struct lwp *l, const struct sys_connect_args *uap,
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register_t *retval)
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{
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/* {
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syscallarg(int) s;
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syscallarg(const struct sockaddr *) name;
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syscallarg(unsigned int) namelen;
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} */
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int error;
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struct sockaddr_big sbig;
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error = sockargs_sb(&sbig, SCARG(uap, name), SCARG(uap, namelen));
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if (error)
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return error;
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return do_sys_connect(l, SCARG(uap, s), (struct sockaddr *)&sbig);
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}
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int
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do_sys_connect(struct lwp *l, int fd, struct sockaddr *nam)
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{
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struct socket *so;
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int error;
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int interrupted = 0;
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|
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if ((error = fd_getsock(fd, &so)) != 0) {
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return (error);
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}
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solock(so);
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if ((so->so_state & SS_ISCONNECTING) != 0) {
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error = EALREADY;
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goto out;
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}
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error = soconnect(so, nam, l);
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if (error)
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goto bad;
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if ((so->so_state & (SS_NBIO|SS_ISCONNECTING)) ==
|
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(SS_NBIO|SS_ISCONNECTING)) {
|
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error = EINPROGRESS;
|
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goto out;
|
|
}
|
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while ((so->so_state & SS_ISCONNECTING) != 0 && so->so_error == 0) {
|
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error = sowait(so, true, 0);
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if (__predict_false((so->so_state & SS_ISABORTING) != 0)) {
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error = EPIPE;
|
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interrupted = 1;
|
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break;
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}
|
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if (error) {
|
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if (error == EINTR || error == ERESTART)
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interrupted = 1;
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break;
|
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}
|
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}
|
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if (error == 0) {
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error = so->so_error;
|
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so->so_error = 0;
|
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}
|
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bad:
|
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if (!interrupted)
|
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so->so_state &= ~SS_ISCONNECTING;
|
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if (error == ERESTART)
|
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error = EINTR;
|
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out:
|
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sounlock(so);
|
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fd_putfile(fd);
|
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return error;
|
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}
|
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|
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static int
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makesocket(struct lwp *l, file_t **fp, int *fd, int flags, int type,
|
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int domain, int proto, struct socket *soo)
|
|
{
|
|
struct socket *so;
|
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int error;
|
|
|
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if ((error = socreate(domain, &so, type, proto, l, soo)) != 0) {
|
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return error;
|
|
}
|
|
if (flags & SOCK_NONBLOCK) {
|
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so->so_state |= SS_NBIO;
|
|
}
|
|
|
|
if ((error = fd_allocfile(fp, fd)) != 0) {
|
|
soclose(so);
|
|
return error;
|
|
}
|
|
fd_set_exclose(l, *fd, (flags & SOCK_CLOEXEC) != 0);
|
|
(*fp)->f_flag = FREAD|FWRITE|
|
|
((flags & SOCK_NONBLOCK) ? FNONBLOCK : 0)|
|
|
((flags & SOCK_NOSIGPIPE) ? FNOSIGPIPE : 0);
|
|
(*fp)->f_type = DTYPE_SOCKET;
|
|
(*fp)->f_ops = &socketops;
|
|
(*fp)->f_socket = so;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
sys_socketpair(struct lwp *l, const struct sys_socketpair_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) domain;
|
|
syscallarg(int) type;
|
|
syscallarg(int) protocol;
|
|
syscallarg(int *) rsv;
|
|
} */
|
|
file_t *fp1, *fp2;
|
|
struct socket *so1, *so2;
|
|
int fd, error, sv[2];
|
|
proc_t *p = curproc;
|
|
int flags = SCARG(uap, type) & SOCK_FLAGS_MASK;
|
|
int type = SCARG(uap, type) & ~SOCK_FLAGS_MASK;
|
|
int domain = SCARG(uap, domain);
|
|
int proto = SCARG(uap, protocol);
|
|
|
|
error = makesocket(l, &fp1, &fd, flags, type, domain, proto, NULL);
|
|
if (error)
|
|
return error;
|
|
so1 = fp1->f_socket;
|
|
sv[0] = fd;
|
|
|
|
error = makesocket(l, &fp2, &fd, flags, type, domain, proto, so1);
|
|
if (error)
|
|
goto out;
|
|
so2 = fp2->f_socket;
|
|
sv[1] = fd;
|
|
|
|
solock(so1);
|
|
error = soconnect2(so1, so2);
|
|
if (error == 0 && type == SOCK_DGRAM) {
|
|
/*
|
|
* Datagram socket connection is asymmetric.
|
|
*/
|
|
error = soconnect2(so2, so1);
|
|
}
|
|
sounlock(so1);
|
|
|
|
if (error == 0)
|
|
error = copyout(sv, SCARG(uap, rsv), sizeof(sv));
|
|
if (error == 0) {
|
|
fd_affix(p, fp2, sv[1]);
|
|
fd_affix(p, fp1, sv[0]);
|
|
return 0;
|
|
}
|
|
fd_abort(p, fp2, sv[1]);
|
|
(void)soclose(so2);
|
|
out:
|
|
fd_abort(p, fp1, sv[0]);
|
|
(void)soclose(so1);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_sendto(struct lwp *l, const struct sys_sendto_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(const void *) buf;
|
|
syscallarg(size_t) len;
|
|
syscallarg(int) flags;
|
|
syscallarg(const struct sockaddr *) to;
|
|
syscallarg(unsigned int) tolen;
|
|
} */
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
|
|
msg.msg_name = __UNCONST(SCARG(uap, to)); /* XXXUNCONST kills const */
|
|
msg.msg_namelen = SCARG(uap, tolen);
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_control = NULL;
|
|
msg.msg_flags = 0;
|
|
aiov.iov_base = __UNCONST(SCARG(uap, buf)); /* XXXUNCONST kills const */
|
|
aiov.iov_len = SCARG(uap, len);
|
|
return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval);
|
|
}
|
|
|
|
int
|
|
sys_sendmsg(struct lwp *l, const struct sys_sendmsg_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(const struct msghdr *) msg;
|
|
syscallarg(int) flags;
|
|
} */
|
|
struct msghdr msg;
|
|
int error;
|
|
|
|
error = copyin(SCARG(uap, msg), &msg, sizeof(msg));
|
|
if (error)
|
|
return (error);
|
|
|
|
msg.msg_flags = MSG_IOVUSRSPACE;
|
|
return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval);
|
|
}
|
|
|
|
static int
|
|
do_sys_sendmsg_so(struct lwp *l, int s, struct socket *so, file_t *fp,
|
|
struct msghdr *mp, int flags, register_t *retsize)
|
|
{
|
|
|
|
struct iovec aiov[UIO_SMALLIOV], *iov = aiov, *tiov, *ktriov = NULL;
|
|
struct sockaddr *sa = NULL;
|
|
struct mbuf *to, *control;
|
|
struct uio auio;
|
|
size_t len, iovsz;
|
|
int i, error;
|
|
|
|
ktrkuser("msghdr", mp, sizeof *mp);
|
|
|
|
/* If the caller passed us stuff in mbufs, we must free them. */
|
|
to = (mp->msg_flags & MSG_NAMEMBUF) ? mp->msg_name : NULL;
|
|
control = (mp->msg_flags & MSG_CONTROLMBUF) ? mp->msg_control : NULL;
|
|
iovsz = mp->msg_iovlen * sizeof(struct iovec);
|
|
|
|
if (mp->msg_flags & MSG_IOVUSRSPACE) {
|
|
if ((unsigned int)mp->msg_iovlen > UIO_SMALLIOV) {
|
|
if ((unsigned int)mp->msg_iovlen > IOV_MAX) {
|
|
error = EMSGSIZE;
|
|
goto bad;
|
|
}
|
|
iov = kmem_alloc(iovsz, KM_SLEEP);
|
|
}
|
|
if (mp->msg_iovlen != 0) {
|
|
error = copyin(mp->msg_iov, iov, iovsz);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
auio.uio_iov = iov;
|
|
} else
|
|
auio.uio_iov = mp->msg_iov;
|
|
|
|
auio.uio_iovcnt = mp->msg_iovlen;
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
KASSERT(l == curlwp);
|
|
auio.uio_vmspace = l->l_proc->p_vmspace;
|
|
|
|
tiov = auio.uio_iov;
|
|
for (i = 0; i < auio.uio_iovcnt; i++, tiov++) {
|
|
/*
|
|
* Writes return ssize_t because -1 is returned on error.
|
|
* Therefore, we must restrict the length to SSIZE_MAX to
|
|
* avoid garbage return values.
|
|
*/
|
|
auio.uio_resid += tiov->iov_len;
|
|
if (tiov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
if (mp->msg_name && to == NULL) {
|
|
error = sockargs(&to, mp->msg_name, mp->msg_namelen,
|
|
MT_SONAME);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
|
|
if (mp->msg_control) {
|
|
if (mp->msg_controllen < CMSG_ALIGN(sizeof(struct cmsghdr))) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
if (control == NULL) {
|
|
error = sockargs(&control, mp->msg_control,
|
|
mp->msg_controllen, MT_CONTROL);
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
if (ktrpoint(KTR_GENIO) && iovsz > 0) {
|
|
ktriov = kmem_alloc(iovsz, KM_SLEEP);
|
|
memcpy(ktriov, auio.uio_iov, iovsz);
|
|
}
|
|
|
|
if (mp->msg_name)
|
|
MCLAIM(to, so->so_mowner);
|
|
if (mp->msg_control)
|
|
MCLAIM(control, so->so_mowner);
|
|
|
|
if (to) {
|
|
sa = mtod(to, struct sockaddr *);
|
|
}
|
|
|
|
len = auio.uio_resid;
|
|
error = (*so->so_send)(so, sa, &auio, NULL, control, flags, l);
|
|
/* Protocol is responsible for freeing 'control' */
|
|
control = NULL;
|
|
|
|
if (error) {
|
|
if (auio.uio_resid != len && (error == ERESTART ||
|
|
error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
if (error == EPIPE && (fp->f_flag & FNOSIGPIPE) == 0 &&
|
|
(flags & MSG_NOSIGNAL) == 0) {
|
|
mutex_enter(proc_lock);
|
|
psignal(l->l_proc, SIGPIPE);
|
|
mutex_exit(proc_lock);
|
|
}
|
|
}
|
|
if (error == 0)
|
|
*retsize = len - auio.uio_resid;
|
|
|
|
bad:
|
|
if (ktriov != NULL) {
|
|
ktrgeniov(s, UIO_WRITE, ktriov, *retsize, error);
|
|
kmem_free(ktriov, iovsz);
|
|
}
|
|
|
|
if (iov != aiov)
|
|
kmem_free(iov, iovsz);
|
|
if (to)
|
|
m_freem(to);
|
|
if (control)
|
|
m_freem(control);
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
do_sys_sendmsg(struct lwp *l, int s, struct msghdr *mp, int flags,
|
|
register_t *retsize)
|
|
{
|
|
int error;
|
|
struct socket *so;
|
|
file_t *fp;
|
|
|
|
if ((error = fd_getsock1(s, &so, &fp)) != 0) {
|
|
/* We have to free msg_name and msg_control ourselves */
|
|
if (mp->msg_flags & MSG_NAMEMBUF)
|
|
m_freem(mp->msg_name);
|
|
if (mp->msg_flags & MSG_CONTROLMBUF)
|
|
m_freem(mp->msg_control);
|
|
return error;
|
|
}
|
|
error = do_sys_sendmsg_so(l, s, so, fp, mp, flags, retsize);
|
|
/* msg_name and msg_control freed */
|
|
fd_putfile(s);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_recvfrom(struct lwp *l, const struct sys_recvfrom_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(void *) buf;
|
|
syscallarg(size_t) len;
|
|
syscallarg(int) flags;
|
|
syscallarg(struct sockaddr *) from;
|
|
syscallarg(unsigned int *) fromlenaddr;
|
|
} */
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
struct mbuf *from;
|
|
|
|
msg.msg_name = NULL;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, len);
|
|
msg.msg_control = NULL;
|
|
msg.msg_flags = SCARG(uap, flags) & MSG_USERFLAGS;
|
|
|
|
error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from, NULL, retval);
|
|
if (error != 0)
|
|
return error;
|
|
|
|
error = copyout_sockname(SCARG(uap, from), SCARG(uap, fromlenaddr),
|
|
MSG_LENUSRSPACE, from);
|
|
if (from != NULL)
|
|
m_free(from);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_recvmsg(struct lwp *l, const struct sys_recvmsg_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(struct msghdr *) msg;
|
|
syscallarg(int) flags;
|
|
} */
|
|
struct msghdr msg;
|
|
int error;
|
|
struct mbuf *from, *control;
|
|
|
|
error = copyin(SCARG(uap, msg), &msg, sizeof(msg));
|
|
if (error)
|
|
return error;
|
|
|
|
msg.msg_flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE;
|
|
|
|
error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &from,
|
|
msg.msg_control != NULL ? &control : NULL, retval);
|
|
if (error != 0)
|
|
return error;
|
|
|
|
if (msg.msg_control != NULL)
|
|
error = copyout_msg_control(l, &msg, control);
|
|
|
|
if (error == 0)
|
|
error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0,
|
|
from);
|
|
if (from != NULL)
|
|
m_free(from);
|
|
if (error == 0) {
|
|
ktrkuser("msghdr", &msg, sizeof msg);
|
|
error = copyout(&msg, SCARG(uap, msg), sizeof(msg));
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_sendmmsg(struct lwp *l, const struct sys_sendmmsg_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(struct mmsghdr *) mmsg;
|
|
syscallarg(unsigned int) vlen;
|
|
syscallarg(unsigned int) flags;
|
|
} */
|
|
struct mmsghdr mmsg;
|
|
struct socket *so;
|
|
file_t *fp;
|
|
struct msghdr *msg = &mmsg.msg_hdr;
|
|
int error, s;
|
|
unsigned int vlen, flags, dg;
|
|
|
|
s = SCARG(uap, s);
|
|
if ((error = fd_getsock1(s, &so, &fp)) != 0)
|
|
return error;
|
|
|
|
vlen = SCARG(uap, vlen);
|
|
if (vlen > 1024)
|
|
vlen = 1024;
|
|
|
|
flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE;
|
|
|
|
for (dg = 0; dg < vlen;) {
|
|
error = copyin(SCARG(uap, mmsg) + dg, &mmsg, sizeof(mmsg));
|
|
if (error)
|
|
break;
|
|
|
|
msg->msg_flags = flags;
|
|
|
|
error = do_sys_sendmsg_so(l, s, so, fp, msg, flags, retval);
|
|
if (error)
|
|
break;
|
|
|
|
ktrkuser("msghdr", msg, sizeof *msg);
|
|
mmsg.msg_len = *retval;
|
|
error = copyout(&mmsg, SCARG(uap, mmsg) + dg, sizeof(mmsg));
|
|
if (error)
|
|
break;
|
|
dg++;
|
|
|
|
}
|
|
|
|
*retval = dg;
|
|
if (error)
|
|
so->so_error = error;
|
|
|
|
fd_putfile(s);
|
|
|
|
/*
|
|
* If we succeeded at least once, return 0, hopefully so->so_error
|
|
* will catch it next time.
|
|
*/
|
|
if (dg)
|
|
return 0;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Adjust for a truncated SCM_RIGHTS control message.
|
|
* This means closing any file descriptors that aren't present
|
|
* in the returned buffer.
|
|
* m is the mbuf holding the (already externalized) SCM_RIGHTS message.
|
|
*/
|
|
static void
|
|
free_rights(struct mbuf *m)
|
|
{
|
|
struct cmsghdr *cm;
|
|
int *fdv;
|
|
unsigned int nfds, i;
|
|
|
|
KASSERT(sizeof(*cm) <= m->m_len);
|
|
cm = mtod(m, struct cmsghdr *);
|
|
|
|
KASSERT(CMSG_ALIGN(sizeof(*cm)) <= cm->cmsg_len);
|
|
KASSERT(cm->cmsg_len <= m->m_len);
|
|
nfds = (cm->cmsg_len - CMSG_ALIGN(sizeof(*cm))) / sizeof(int);
|
|
fdv = (int *)CMSG_DATA(cm);
|
|
|
|
for (i = 0; i < nfds; i++)
|
|
if (fd_getfile(fdv[i]) != NULL)
|
|
(void)fd_close(fdv[i]);
|
|
}
|
|
|
|
void
|
|
free_control_mbuf(struct lwp *l, struct mbuf *control, struct mbuf *uncopied)
|
|
{
|
|
struct mbuf *next;
|
|
struct cmsghdr *cmsg;
|
|
bool do_free_rights = false;
|
|
|
|
while (control != NULL) {
|
|
cmsg = mtod(control, struct cmsghdr *);
|
|
if (control == uncopied)
|
|
do_free_rights = true;
|
|
if (do_free_rights && cmsg->cmsg_level == SOL_SOCKET
|
|
&& cmsg->cmsg_type == SCM_RIGHTS)
|
|
free_rights(control);
|
|
next = control->m_next;
|
|
m_free(control);
|
|
control = next;
|
|
}
|
|
}
|
|
|
|
/* Copy socket control/CMSG data to user buffer, frees the mbuf */
|
|
int
|
|
copyout_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control)
|
|
{
|
|
int i, len, error = 0;
|
|
struct cmsghdr *cmsg;
|
|
struct mbuf *m;
|
|
char *q;
|
|
|
|
len = mp->msg_controllen;
|
|
if (len <= 0 || control == 0) {
|
|
mp->msg_controllen = 0;
|
|
free_control_mbuf(l, control, control);
|
|
return 0;
|
|
}
|
|
|
|
q = (char *)mp->msg_control;
|
|
|
|
for (m = control; m != NULL; ) {
|
|
cmsg = mtod(m, struct cmsghdr *);
|
|
i = m->m_len;
|
|
if (len < i) {
|
|
mp->msg_flags |= MSG_CTRUNC;
|
|
if (cmsg->cmsg_level == SOL_SOCKET
|
|
&& cmsg->cmsg_type == SCM_RIGHTS)
|
|
/* Do not truncate me ... */
|
|
break;
|
|
i = len;
|
|
}
|
|
error = copyout(mtod(m, void *), q, i);
|
|
ktrkuser("msgcontrol", mtod(m, void *), i);
|
|
if (error != 0) {
|
|
/* We must free all the SCM_RIGHTS */
|
|
m = control;
|
|
break;
|
|
}
|
|
m = m->m_next;
|
|
if (m)
|
|
i = ALIGN(i);
|
|
q += i;
|
|
len -= i;
|
|
if (len <= 0)
|
|
break;
|
|
}
|
|
|
|
free_control_mbuf(l, control, m);
|
|
|
|
mp->msg_controllen = q - (char *)mp->msg_control;
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
do_sys_recvmsg_so(struct lwp *l, int s, struct socket *so, struct msghdr *mp,
|
|
struct mbuf **from, struct mbuf **control, register_t *retsize)
|
|
{
|
|
struct iovec aiov[UIO_SMALLIOV], *iov = aiov, *tiov, *ktriov = NULL;
|
|
struct uio auio;
|
|
size_t len, iovsz;
|
|
int i, error;
|
|
|
|
ktrkuser("msghdr", mp, sizeof *mp);
|
|
|
|
*from = NULL;
|
|
if (control != NULL)
|
|
*control = NULL;
|
|
|
|
iovsz = mp->msg_iovlen * sizeof(struct iovec);
|
|
|
|
if (mp->msg_flags & MSG_IOVUSRSPACE) {
|
|
if ((unsigned int)mp->msg_iovlen > UIO_SMALLIOV) {
|
|
if ((unsigned int)mp->msg_iovlen > IOV_MAX) {
|
|
error = EMSGSIZE;
|
|
goto out;
|
|
}
|
|
iov = kmem_alloc(iovsz, KM_SLEEP);
|
|
}
|
|
if (mp->msg_iovlen != 0) {
|
|
error = copyin(mp->msg_iov, iov, iovsz);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
auio.uio_iov = iov;
|
|
} else
|
|
auio.uio_iov = mp->msg_iov;
|
|
auio.uio_iovcnt = mp->msg_iovlen;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
KASSERT(l == curlwp);
|
|
auio.uio_vmspace = l->l_proc->p_vmspace;
|
|
|
|
tiov = auio.uio_iov;
|
|
for (i = 0; i < auio.uio_iovcnt; i++, tiov++) {
|
|
/*
|
|
* Reads return ssize_t because -1 is returned on error.
|
|
* Therefore we must restrict the length to SSIZE_MAX to
|
|
* avoid garbage return values.
|
|
*/
|
|
auio.uio_resid += tiov->iov_len;
|
|
if (tiov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (ktrpoint(KTR_GENIO) && iovsz > 0) {
|
|
ktriov = kmem_alloc(iovsz, KM_SLEEP);
|
|
memcpy(ktriov, auio.uio_iov, iovsz);
|
|
}
|
|
|
|
len = auio.uio_resid;
|
|
mp->msg_flags &= MSG_USERFLAGS;
|
|
error = (*so->so_receive)(so, from, &auio, NULL, control,
|
|
&mp->msg_flags);
|
|
len -= auio.uio_resid;
|
|
*retsize = len;
|
|
if (error != 0 && len != 0
|
|
&& (error == ERESTART || error == EINTR || error == EWOULDBLOCK))
|
|
/* Some data transferred */
|
|
error = 0;
|
|
|
|
if (ktriov != NULL) {
|
|
ktrgeniov(s, UIO_READ, ktriov, len, error);
|
|
kmem_free(ktriov, iovsz);
|
|
}
|
|
|
|
if (error != 0) {
|
|
m_freem(*from);
|
|
*from = NULL;
|
|
if (control != NULL) {
|
|
free_control_mbuf(l, *control, *control);
|
|
*control = NULL;
|
|
}
|
|
}
|
|
out:
|
|
if (iov != aiov)
|
|
kmem_free(iov, iovsz);
|
|
return error;
|
|
}
|
|
|
|
|
|
int
|
|
do_sys_recvmsg(struct lwp *l, int s, struct msghdr *mp, struct mbuf **from,
|
|
struct mbuf **control, register_t *retsize)
|
|
{
|
|
int error;
|
|
struct socket *so;
|
|
|
|
if ((error = fd_getsock(s, &so)) != 0)
|
|
return error;
|
|
error = do_sys_recvmsg_so(l, s, so, mp, from, control, retsize);
|
|
fd_putfile(s);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_recvmmsg(struct lwp *l, const struct sys_recvmmsg_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(struct mmsghdr *) mmsg;
|
|
syscallarg(unsigned int) vlen;
|
|
syscallarg(unsigned int) flags;
|
|
syscallarg(struct timespec *) timeout;
|
|
} */
|
|
struct mmsghdr mmsg;
|
|
struct socket *so;
|
|
struct msghdr *msg = &mmsg.msg_hdr;
|
|
int error, s;
|
|
struct mbuf *from, *control;
|
|
struct timespec ts, now;
|
|
unsigned int vlen, flags, dg;
|
|
|
|
if (SCARG(uap, timeout)) {
|
|
if ((error = copyin(SCARG(uap, timeout), &ts, sizeof(ts))) != 0)
|
|
return error;
|
|
getnanotime(&now);
|
|
timespecadd(&now, &ts, &ts);
|
|
}
|
|
|
|
s = SCARG(uap, s);
|
|
if ((error = fd_getsock(s, &so)) != 0)
|
|
return error;
|
|
|
|
vlen = SCARG(uap, vlen);
|
|
if (vlen > 1024)
|
|
vlen = 1024;
|
|
|
|
from = NULL;
|
|
flags = (SCARG(uap, flags) & MSG_USERFLAGS) | MSG_IOVUSRSPACE;
|
|
|
|
for (dg = 0; dg < vlen;) {
|
|
error = copyin(SCARG(uap, mmsg) + dg, &mmsg, sizeof(mmsg));
|
|
if (error)
|
|
break;
|
|
|
|
msg->msg_flags = flags & ~MSG_WAITFORONE;
|
|
|
|
if (from != NULL) {
|
|
m_free(from);
|
|
from = NULL;
|
|
}
|
|
|
|
error = do_sys_recvmsg_so(l, s, so, msg, &from,
|
|
msg->msg_control != NULL ? &control : NULL, retval);
|
|
if (error) {
|
|
if (error == EAGAIN && dg > 0)
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
if (msg->msg_control != NULL)
|
|
error = copyout_msg_control(l, msg, control);
|
|
if (error)
|
|
break;
|
|
|
|
error = copyout_sockname(msg->msg_name, &msg->msg_namelen, 0,
|
|
from);
|
|
if (error)
|
|
break;
|
|
|
|
ktrkuser("msghdr", msg, sizeof *msg);
|
|
mmsg.msg_len = *retval;
|
|
|
|
error = copyout(&mmsg, SCARG(uap, mmsg) + dg, sizeof(mmsg));
|
|
if (error)
|
|
break;
|
|
|
|
dg++;
|
|
if (msg->msg_flags & MSG_OOB)
|
|
break;
|
|
|
|
if (SCARG(uap, timeout)) {
|
|
getnanotime(&now);
|
|
timespecsub(&now, &ts, &now);
|
|
if (now.tv_sec > 0)
|
|
break;
|
|
}
|
|
|
|
if (flags & MSG_WAITFORONE)
|
|
flags |= MSG_DONTWAIT;
|
|
|
|
}
|
|
|
|
if (from != NULL)
|
|
m_free(from);
|
|
|
|
*retval = dg;
|
|
if (error)
|
|
so->so_error = error;
|
|
|
|
fd_putfile(s);
|
|
|
|
/*
|
|
* If we succeeded at least once, return 0, hopefully so->so_error
|
|
* will catch it next time.
|
|
*/
|
|
if (dg)
|
|
return 0;
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_shutdown(struct lwp *l, const struct sys_shutdown_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(int) how;
|
|
} */
|
|
struct socket *so;
|
|
int error;
|
|
|
|
if ((error = fd_getsock(SCARG(uap, s), &so)) != 0)
|
|
return error;
|
|
solock(so);
|
|
error = soshutdown(so, SCARG(uap, how));
|
|
sounlock(so);
|
|
fd_putfile(SCARG(uap, s));
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_setsockopt(struct lwp *l, const struct sys_setsockopt_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(int) level;
|
|
syscallarg(int) name;
|
|
syscallarg(const void *) val;
|
|
syscallarg(unsigned int) valsize;
|
|
} */
|
|
struct sockopt sopt;
|
|
struct socket *so;
|
|
file_t *fp;
|
|
int error;
|
|
unsigned int len;
|
|
|
|
len = SCARG(uap, valsize);
|
|
if (len > 0 && SCARG(uap, val) == NULL)
|
|
return EINVAL;
|
|
|
|
if (len > MCLBYTES)
|
|
return EINVAL;
|
|
|
|
if ((error = fd_getsock1(SCARG(uap, s), &so, &fp)) != 0)
|
|
return (error);
|
|
|
|
sockopt_init(&sopt, SCARG(uap, level), SCARG(uap, name), len);
|
|
|
|
if (len > 0) {
|
|
error = copyin(SCARG(uap, val), sopt.sopt_data, len);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
error = sosetopt(so, &sopt);
|
|
if (so->so_options & SO_NOSIGPIPE)
|
|
atomic_or_uint(&fp->f_flag, FNOSIGPIPE);
|
|
else
|
|
atomic_and_uint(&fp->f_flag, ~FNOSIGPIPE);
|
|
|
|
out:
|
|
sockopt_destroy(&sopt);
|
|
fd_putfile(SCARG(uap, s));
|
|
return error;
|
|
}
|
|
|
|
int
|
|
sys_getsockopt(struct lwp *l, const struct sys_getsockopt_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) s;
|
|
syscallarg(int) level;
|
|
syscallarg(int) name;
|
|
syscallarg(void *) val;
|
|
syscallarg(unsigned int *) avalsize;
|
|
} */
|
|
struct sockopt sopt;
|
|
struct socket *so;
|
|
file_t *fp;
|
|
unsigned int valsize, len;
|
|
int error;
|
|
|
|
if (SCARG(uap, val) != NULL) {
|
|
error = copyin(SCARG(uap, avalsize), &valsize, sizeof(valsize));
|
|
if (error)
|
|
return error;
|
|
} else
|
|
valsize = 0;
|
|
|
|
if ((error = fd_getsock1(SCARG(uap, s), &so, &fp)) != 0)
|
|
return (error);
|
|
|
|
sockopt_init(&sopt, SCARG(uap, level), SCARG(uap, name), 0);
|
|
|
|
if (fp->f_flag & FNOSIGPIPE)
|
|
so->so_options |= SO_NOSIGPIPE;
|
|
else
|
|
so->so_options &= ~SO_NOSIGPIPE;
|
|
error = sogetopt(so, &sopt);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (valsize > 0) {
|
|
len = min(valsize, sopt.sopt_size);
|
|
error = copyout(sopt.sopt_data, SCARG(uap, val), len);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = copyout(&len, SCARG(uap, avalsize), sizeof(len));
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
sockopt_destroy(&sopt);
|
|
fd_putfile(SCARG(uap, s));
|
|
return error;
|
|
}
|
|
|
|
#ifdef PIPE_SOCKETPAIR
|
|
|
|
int
|
|
pipe1(struct lwp *l, register_t *retval, int flags)
|
|
{
|
|
file_t *rf, *wf;
|
|
struct socket *rso, *wso;
|
|
int fd, error;
|
|
proc_t *p;
|
|
|
|
if (flags & ~(O_CLOEXEC|O_NONBLOCK|O_NOSIGPIPE))
|
|
return EINVAL;
|
|
p = curproc;
|
|
if ((error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0, l, NULL)) != 0)
|
|
return error;
|
|
if ((error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0, l, rso)) != 0)
|
|
goto free1;
|
|
/* remember this socket pair implements a pipe */
|
|
wso->so_state |= SS_ISAPIPE;
|
|
rso->so_state |= SS_ISAPIPE;
|
|
if ((error = fd_allocfile(&rf, &fd)) != 0)
|
|
goto free2;
|
|
retval[0] = fd;
|
|
rf->f_flag = FREAD | flags;
|
|
rf->f_type = DTYPE_SOCKET;
|
|
rf->f_ops = &socketops;
|
|
rf->f_socket = rso;
|
|
if ((error = fd_allocfile(&wf, &fd)) != 0)
|
|
goto free3;
|
|
wf->f_flag = FWRITE | flags;
|
|
wf->f_type = DTYPE_SOCKET;
|
|
wf->f_ops = &socketops;
|
|
wf->f_socket = wso;
|
|
retval[1] = fd;
|
|
solock(wso);
|
|
error = unp_connect2(wso, rso);
|
|
sounlock(wso);
|
|
if (error != 0)
|
|
goto free4;
|
|
fd_affix(p, wf, (int)retval[1]);
|
|
fd_affix(p, rf, (int)retval[0]);
|
|
return (0);
|
|
free4:
|
|
fd_abort(p, wf, (int)retval[1]);
|
|
free3:
|
|
fd_abort(p, rf, (int)retval[0]);
|
|
free2:
|
|
(void)soclose(wso);
|
|
free1:
|
|
(void)soclose(rso);
|
|
return error;
|
|
}
|
|
#endif /* PIPE_SOCKETPAIR */
|
|
|
|
/*
|
|
* Get peer socket name.
|
|
*/
|
|
int
|
|
do_sys_getpeername(int fd, struct sockaddr *nam)
|
|
{
|
|
struct socket *so;
|
|
int error;
|
|
|
|
if ((error = fd_getsock(fd, &so)) != 0)
|
|
return error;
|
|
|
|
solock(so);
|
|
if ((so->so_state & SS_ISCONNECTED) == 0)
|
|
error = ENOTCONN;
|
|
else {
|
|
error = (*so->so_proto->pr_usrreqs->pr_peeraddr)(so, nam);
|
|
}
|
|
sounlock(so);
|
|
fd_putfile(fd);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Get local socket name.
|
|
*/
|
|
int
|
|
do_sys_getsockname(int fd, struct sockaddr *nam)
|
|
{
|
|
struct socket *so;
|
|
int error;
|
|
|
|
if ((error = fd_getsock(fd, &so)) != 0)
|
|
return error;
|
|
|
|
solock(so);
|
|
error = (*so->so_proto->pr_usrreqs->pr_sockaddr)(so, nam);
|
|
sounlock(so);
|
|
fd_putfile(fd);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
copyout_sockname_sb(struct sockaddr *asa, unsigned int *alen, int flags,
|
|
struct sockaddr_big *addr)
|
|
{
|
|
int len;
|
|
int error;
|
|
|
|
if (asa == NULL)
|
|
/* Assume application not interested */
|
|
return 0;
|
|
|
|
if (flags & MSG_LENUSRSPACE) {
|
|
error = copyin(alen, &len, sizeof(len));
|
|
if (error)
|
|
return error;
|
|
} else
|
|
len = *alen;
|
|
if (len < 0)
|
|
return EINVAL;
|
|
|
|
if (addr == NULL) {
|
|
len = 0;
|
|
error = 0;
|
|
} else {
|
|
if (len > addr->sb_len)
|
|
len = addr->sb_len;
|
|
/* XXX addr isn't an mbuf... */
|
|
ktrkuser(mbuftypes[MT_SONAME], addr, len);
|
|
error = copyout(addr, asa, len);
|
|
}
|
|
|
|
if (error == 0) {
|
|
if (flags & MSG_LENUSRSPACE)
|
|
error = copyout(&len, alen, sizeof(len));
|
|
else
|
|
*alen = len;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
int
|
|
copyout_sockname(struct sockaddr *asa, unsigned int *alen, int flags,
|
|
struct mbuf *addr)
|
|
{
|
|
int len;
|
|
int error;
|
|
|
|
if (asa == NULL)
|
|
/* Assume application not interested */
|
|
return 0;
|
|
|
|
if (flags & MSG_LENUSRSPACE) {
|
|
error = copyin(alen, &len, sizeof(len));
|
|
if (error)
|
|
return error;
|
|
} else
|
|
len = *alen;
|
|
if (len < 0)
|
|
return EINVAL;
|
|
|
|
if (addr == NULL) {
|
|
len = 0;
|
|
error = 0;
|
|
} else {
|
|
if (len > addr->m_len)
|
|
len = addr->m_len;
|
|
/* Maybe this ought to copy a chain ? */
|
|
ktrkuser(mbuftypes[MT_SONAME], mtod(addr, void *), len);
|
|
error = copyout(mtod(addr, void *), asa, len);
|
|
}
|
|
|
|
if (error == 0) {
|
|
if (flags & MSG_LENUSRSPACE)
|
|
error = copyout(&len, alen, sizeof(len));
|
|
else
|
|
*alen = len;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Get socket name.
|
|
*/
|
|
int
|
|
sys_getsockname(struct lwp *l, const struct sys_getsockname_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fdes;
|
|
syscallarg(struct sockaddr *) asa;
|
|
syscallarg(unsigned int *) alen;
|
|
} */
|
|
struct sockaddr_big sbig;
|
|
int error;
|
|
|
|
sbig.sb_len = UCHAR_MAX;
|
|
error = do_sys_getsockname(SCARG(uap, fdes), (struct sockaddr *)&sbig);
|
|
if (error != 0)
|
|
return error;
|
|
|
|
error = copyout_sockname_sb(SCARG(uap, asa), SCARG(uap, alen),
|
|
MSG_LENUSRSPACE, &sbig);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Get name of peer for connected socket.
|
|
*/
|
|
int
|
|
sys_getpeername(struct lwp *l, const struct sys_getpeername_args *uap,
|
|
register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fdes;
|
|
syscallarg(struct sockaddr *) asa;
|
|
syscallarg(unsigned int *) alen;
|
|
} */
|
|
struct sockaddr_big sbig;
|
|
int error;
|
|
|
|
sbig.sb_len = UCHAR_MAX;
|
|
error = do_sys_getpeername(SCARG(uap, fdes), (struct sockaddr *)&sbig);
|
|
if (error != 0)
|
|
return error;
|
|
|
|
error = copyout_sockname_sb(SCARG(uap, asa), SCARG(uap, alen),
|
|
MSG_LENUSRSPACE, &sbig);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
sockargs_sb(struct sockaddr_big *sb, const void *name, socklen_t buflen)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* We can't allow socket names > UCHAR_MAX in length, since that
|
|
* will overflow sb_len. Further no reasonable buflen is <=
|
|
* offsetof(sockaddr_big, sb_data) since it shall be at least
|
|
* the size of the preamble sb_len and sb_family members.
|
|
*/
|
|
if (buflen > UCHAR_MAX ||
|
|
buflen <= offsetof(struct sockaddr_big, sb_data))
|
|
return EINVAL;
|
|
|
|
error = copyin(name, (void *)sb, buflen);
|
|
if (error)
|
|
return error;
|
|
|
|
#if BYTE_ORDER != BIG_ENDIAN
|
|
/*
|
|
* 4.3BSD compat thing - need to stay, since bind(2),
|
|
* connect(2), sendto(2) were not versioned for COMPAT_43.
|
|
*/
|
|
if (sb->sb_family == 0 && sb->sb_len < AF_MAX)
|
|
sb->sb_family = sb->sb_len;
|
|
#endif
|
|
sb->sb_len = buflen;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* XXX In a perfect world, we wouldn't pass around socket control
|
|
* XXX arguments in mbufs, and this could go away.
|
|
*/
|
|
int
|
|
sockargs(struct mbuf **mp, const void *bf, size_t buflen, int type)
|
|
{
|
|
struct sockaddr *sa;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
/*
|
|
* We can't allow socket names > UCHAR_MAX in length, since that
|
|
* will overflow sa_len. Control data more than a page size in
|
|
* length is just too much.
|
|
*/
|
|
if (buflen > (type == MT_SONAME ? UCHAR_MAX : PAGE_SIZE))
|
|
return EINVAL;
|
|
|
|
/*
|
|
* length must greater than sizeof(sa_family) + sizeof(sa_len)
|
|
*/
|
|
if (type == MT_SONAME && buflen <= 2)
|
|
return EINVAL;
|
|
|
|
/* Allocate an mbuf to hold the arguments. */
|
|
m = m_get(M_WAIT, type);
|
|
/* can't claim. don't who to assign it to. */
|
|
if (buflen > MLEN) {
|
|
/*
|
|
* Won't fit into a regular mbuf, so we allocate just
|
|
* enough external storage to hold the argument.
|
|
*/
|
|
MEXTMALLOC(m, buflen, M_WAITOK);
|
|
}
|
|
m->m_len = buflen;
|
|
error = copyin(bf, mtod(m, void *), buflen);
|
|
if (error) {
|
|
(void)m_free(m);
|
|
return error;
|
|
}
|
|
ktrkuser(mbuftypes[type], mtod(m, void *), buflen);
|
|
*mp = m;
|
|
if (type == MT_SONAME) {
|
|
sa = mtod(m, struct sockaddr *);
|
|
#if BYTE_ORDER != BIG_ENDIAN
|
|
/*
|
|
* 4.3BSD compat thing - need to stay, since bind(2),
|
|
* connect(2), sendto(2) were not versioned for COMPAT_43.
|
|
*/
|
|
if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
|
|
sa->sa_family = sa->sa_len;
|
|
#endif
|
|
sa->sa_len = buflen;
|
|
}
|
|
return 0;
|
|
}
|