530c006014
vnet.h, we now use jails (rather than vimages) as the abstraction for virtualization management, and what remained was specific to virtual network stacks. Minor cleanups are done in the process, and comments updated to reflect these changes. Reviewed by: bz Approved by: re (vimage blanket)
294 lines
7.4 KiB
C
294 lines
7.4 KiB
C
/*-
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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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* 4. 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 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/sigio.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/filio.h> /* XXX */
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#include <sys/sockio.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <sys/ucred.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/vnet.h>
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#include <security/mac/mac_framework.h>
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struct fileops socketops = {
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.fo_read = soo_read,
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.fo_write = soo_write,
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.fo_truncate = soo_truncate,
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.fo_ioctl = soo_ioctl,
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.fo_poll = soo_poll,
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.fo_kqfilter = soo_kqfilter,
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.fo_stat = soo_stat,
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.fo_close = soo_close,
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.fo_flags = DFLAG_PASSABLE
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};
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/* ARGSUSED */
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int
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soo_read(struct file *fp, struct uio *uio, struct ucred *active_cred,
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int flags, struct thread *td)
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{
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struct socket *so = fp->f_data;
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int error;
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#ifdef MAC
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error = mac_socket_check_receive(active_cred, so);
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if (error)
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return (error);
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#endif
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CURVNET_SET(so->so_vnet);
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error = soreceive(so, 0, uio, 0, 0, 0);
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CURVNET_RESTORE();
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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(struct file *fp, struct uio *uio, struct ucred *active_cred,
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int flags, struct thread *td)
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{
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struct socket *so = fp->f_data;
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int error;
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#ifdef MAC
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error = mac_socket_check_send(active_cred, so);
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if (error)
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return (error);
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#endif
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error = sosend(so, 0, uio, 0, 0, 0, uio->uio_td);
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if (error == EPIPE && (so->so_options & SO_NOSIGPIPE) == 0) {
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PROC_LOCK(uio->uio_td->td_proc);
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psignal(uio->uio_td->td_proc, SIGPIPE);
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PROC_UNLOCK(uio->uio_td->td_proc);
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}
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return (error);
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}
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int
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soo_truncate(struct file *fp, off_t length, struct ucred *active_cred,
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struct thread *td)
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{
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return (EINVAL);
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}
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int
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soo_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *active_cred,
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struct thread *td)
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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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CURVNET_SET(so->so_vnet);
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switch (cmd) {
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case FIONBIO:
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SOCK_LOCK(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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SOCK_UNLOCK(so);
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break;
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case FIOASYNC:
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/*
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* XXXRW: This code separately acquires SOCK_LOCK(so) and
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* SOCKBUF_LOCK(&so->so_rcv) even though they are the same
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* mutex to avoid introducing the assumption that they are
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* the same.
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*/
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if (*(int *)data) {
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SOCK_LOCK(so);
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so->so_state |= SS_ASYNC;
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SOCK_UNLOCK(so);
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SOCKBUF_LOCK(&so->so_rcv);
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so->so_rcv.sb_flags |= SB_ASYNC;
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SOCKBUF_UNLOCK(&so->so_rcv);
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SOCKBUF_LOCK(&so->so_snd);
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so->so_snd.sb_flags |= SB_ASYNC;
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SOCKBUF_UNLOCK(&so->so_snd);
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} else {
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SOCK_LOCK(so);
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so->so_state &= ~SS_ASYNC;
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SOCK_UNLOCK(so);
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SOCKBUF_LOCK(&so->so_rcv);
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so->so_rcv.sb_flags &= ~SB_ASYNC;
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SOCKBUF_UNLOCK(&so->so_rcv);
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SOCKBUF_LOCK(&so->so_snd);
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so->so_snd.sb_flags &= ~SB_ASYNC;
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SOCKBUF_UNLOCK(&so->so_snd);
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}
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break;
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case FIONREAD:
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/* Unlocked read. */
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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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/* Unlocked read. */
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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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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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break;
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case FIOSETOWN:
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error = fsetown(*(int *)data, &so->so_sigio);
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break;
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case FIOGETOWN:
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*(int *)data = fgetown(&so->so_sigio);
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break;
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case SIOCSPGRP:
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error = fsetown(-(*(int *)data), &so->so_sigio);
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break;
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case SIOCGPGRP:
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*(int *)data = -fgetown(&so->so_sigio);
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break;
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case SIOCATMARK:
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/* Unlocked read. */
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*(int *)data = (so->so_rcv.sb_state & SBS_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: interface and
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* routing ioctls should have a different entry since a
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* socket is unnecessary.
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*/
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if (IOCGROUP(cmd) == 'i')
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error = ifioctl(so, cmd, data, td);
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else if (IOCGROUP(cmd) == 'r')
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error = rtioctl_fib(cmd, data, so->so_fibnum);
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else
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error = ((*so->so_proto->pr_usrreqs->pru_control)
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(so, cmd, data, 0, td));
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break;
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}
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CURVNET_RESTORE();
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return (error);
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}
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int
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soo_poll(struct file *fp, int events, struct ucred *active_cred,
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struct thread *td)
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{
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struct socket *so = fp->f_data;
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#ifdef MAC
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int error;
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error = mac_socket_check_poll(active_cred, so);
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if (error)
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return (error);
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#endif
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return (sopoll(so, events, fp->f_cred, td));
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}
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int
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soo_stat(struct file *fp, struct stat *ub, struct ucred *active_cred,
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struct thread *td)
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{
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struct socket *so = fp->f_data;
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#ifdef MAC
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int error;
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#endif
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bzero((caddr_t)ub, sizeof (*ub));
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ub->st_mode = S_IFSOCK;
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#ifdef MAC
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error = mac_socket_check_stat(active_cred, so);
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if (error)
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return (error);
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#endif
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/*
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* If SBS_CANTRCVMORE is set, but there's still data left in the
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* receive buffer, the socket is still readable.
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*/
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SOCKBUF_LOCK(&so->so_rcv);
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if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) == 0 ||
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so->so_rcv.sb_cc != 0)
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ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
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ub->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
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SOCKBUF_UNLOCK(&so->so_rcv);
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/* Unlocked read. */
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if ((so->so_snd.sb_state & SBS_CANTSENDMORE) == 0)
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ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
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ub->st_uid = so->so_cred->cr_uid;
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ub->st_gid = so->so_cred->cr_gid;
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return (*so->so_proto->pr_usrreqs->pru_sense)(so, ub);
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}
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/*
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* API socket close on file pointer. We call soclose() to close the socket
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* (including initiating closing protocols). soclose() will sorele() the
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* file reference but the actual socket will not go away until the socket's
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* ref count hits 0.
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*/
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/* ARGSUSED */
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int
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soo_close(struct file *fp, struct thread *td)
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{
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int error = 0;
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struct socket *so;
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so = fp->f_data;
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fp->f_ops = &badfileops;
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fp->f_data = NULL;
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if (so)
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error = soclose(so);
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return (error);
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}
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