269 lines
6.8 KiB
C
269 lines
6.8 KiB
C
/* $NetBSD: sys_socket.c,v 1.65 2011/12/20 23:56:28 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, 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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* @(#)sys_socket.c 8.3 (Berkeley) 2/14/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.65 2011/12/20 23:56:28 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/systm.h>
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#include <sys/file.h>
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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/ioctl.h>
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#include <sys/stat.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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#include <sys/kauth.h>
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#include <net/if.h>
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#include <net/route.h>
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const struct fileops socketops = {
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.fo_read = soo_read,
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.fo_write = soo_write,
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.fo_ioctl = soo_ioctl,
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.fo_fcntl = soo_fcntl,
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.fo_poll = soo_poll,
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.fo_stat = soo_stat,
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.fo_close = soo_close,
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.fo_kqfilter = soo_kqfilter,
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.fo_restart = soo_restart,
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};
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/* ARGSUSED */
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int
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soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred,
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int flags)
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{
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struct socket *so = fp->f_data;
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int error;
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error = (*so->so_receive)(so, NULL, uio, NULL, NULL, NULL);
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return error;
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}
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/* ARGSUSED */
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int
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soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred,
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int flags)
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{
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struct socket *so = fp->f_data;
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int error;
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error = (*so->so_send)(so, NULL, uio, NULL, NULL, 0, curlwp);
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return error;
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}
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int
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soo_ioctl(file_t *fp, u_long cmd, void *data)
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{
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struct socket *so = fp->f_data;
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int error = 0;
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switch (cmd) {
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case FIONBIO:
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solock(so);
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if (*(int *)data)
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so->so_state |= SS_NBIO;
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else
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so->so_state &= ~SS_NBIO;
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sounlock(so);
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break;
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case FIOASYNC:
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solock(so);
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if (*(int *)data) {
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so->so_state |= SS_ASYNC;
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so->so_rcv.sb_flags |= SB_ASYNC;
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so->so_snd.sb_flags |= SB_ASYNC;
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} else {
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so->so_state &= ~SS_ASYNC;
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so->so_rcv.sb_flags &= ~SB_ASYNC;
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so->so_snd.sb_flags &= ~SB_ASYNC;
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}
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sounlock(so);
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break;
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case FIONREAD:
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*(int *)data = so->so_rcv.sb_cc;
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break;
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case FIONWRITE:
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*(int *)data = so->so_snd.sb_cc;
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break;
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case FIONSPACE:
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/*
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* See the comment around sbspace()'s definition
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* in sys/socketvar.h in face of counts about maximum
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* to understand the following test. We detect overflow
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* and return zero.
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*/
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solock(so);
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if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc)
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|| (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt))
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*(int *)data = 0;
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else
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*(int *)data = sbspace(&so->so_snd);
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sounlock(so);
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break;
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case SIOCSPGRP:
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case FIOSETOWN:
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case TIOCSPGRP:
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error = fsetown(&so->so_pgid, cmd, data);
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break;
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case SIOCGPGRP:
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case FIOGETOWN:
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case TIOCGPGRP:
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error = fgetown(so->so_pgid, cmd, data);
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break;
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case SIOCATMARK:
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*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
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break;
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default:
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/*
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* Interface/routing/protocol specific ioctls:
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* interface and routing ioctls should have a
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* different entry since a socket's unnecessary
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*/
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KERNEL_LOCK(1, NULL);
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if (IOCGROUP(cmd) == 'i')
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error = ifioctl(so, cmd, data, curlwp);
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else if (IOCGROUP(cmd) == 'r')
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error = rtioctl(cmd, data, curlwp);
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else {
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error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
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(struct mbuf *)cmd, (struct mbuf *)data, NULL,
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curlwp);
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}
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KERNEL_UNLOCK_ONE(NULL);
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break;
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}
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return error;
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}
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int
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soo_fcntl(file_t *fp, u_int cmd, void *data)
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{
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if (cmd == F_SETFL)
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return 0;
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else
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return EOPNOTSUPP;
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}
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int
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soo_poll(file_t *fp, int events)
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{
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return sopoll(fp->f_data, events);
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}
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int
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soo_stat(file_t *fp, struct stat *ub)
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{
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struct socket *so = fp->f_data;
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int error;
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memset(ub, 0, sizeof(*ub));
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ub->st_mode = S_IFSOCK;
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solock(so);
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error = (*so->so_proto->pr_usrreq)(so, PRU_SENSE,
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(struct mbuf *)ub, NULL, NULL, curlwp);
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sounlock(so);
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return error;
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}
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/* ARGSUSED */
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int
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soo_close(file_t *fp)
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{
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int error = 0;
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if (fp->f_data)
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error = soclose(fp->f_data);
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fp->f_data = 0;
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return error;
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}
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void
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soo_restart(file_t *fp)
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{
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sorestart(fp->f_data);
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}
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