de184682fa
by bde, a few other tweaks to get the patch to apply cleanly again and some improvements to the comments. This change closes some fairly minor security holes associated with F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN had on tty devices. For more details, see the description on the PR. Because this patch increases the size of the proc and pgrp structures, it is necessary to re-install the includes and recompile libkvm, the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w. PR: kern/7899 Reviewed by: bde, elvind
183 lines
4.9 KiB
C
183 lines
4.9 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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* $Id: sys_socket.c,v 1.18 1998/06/07 17:11:40 dfr Exp $
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*/
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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/protosw.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/filedesc.h>
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#include <net/if.h>
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#include <net/route.h>
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static int soo_read __P((struct file *fp, struct uio *uio,
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struct ucred *cred));
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static int soo_write __P((struct file *fp, struct uio *uio,
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struct ucred *cred));
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static int soo_close __P((struct file *fp, struct proc *p));
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struct fileops socketops =
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{ soo_read, soo_write, soo_ioctl, soo_poll, soo_close };
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/* ARGSUSED */
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static int
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soo_read(fp, uio, cred)
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struct file *fp;
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struct uio *uio;
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struct ucred *cred;
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{
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struct socket *so = (struct socket *)fp->f_data;
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return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
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}
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/* ARGSUSED */
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static int
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soo_write(fp, uio, cred)
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struct file *fp;
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struct uio *uio;
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struct ucred *cred;
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{
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struct socket *so = (struct socket *)fp->f_data;
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return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0,
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uio->uio_procp);
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}
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int
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soo_ioctl(fp, cmd, data, p)
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struct file *fp;
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u_long cmd;
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register caddr_t data;
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struct proc *p;
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{
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register struct socket *so = (struct socket *)fp->f_data;
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switch (cmd) {
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case FIONBIO:
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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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return (0);
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case FIOASYNC:
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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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return (0);
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case FIONREAD:
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*(int *)data = so->so_rcv.sb_cc;
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return (0);
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case FIOSETOWN:
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return (fsetown(*(int *)data, &so->so_sigio));
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case FIOGETOWN:
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*(int *)data = fgetown(so->so_sigio);
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return (0);
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case SIOCSPGRP:
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return (fsetown(-(*(int *)data), &so->so_sigio));
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case SIOCGPGRP:
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*(int *)data = -fgetown(so->so_sigio);
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return (0);
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case SIOCATMARK:
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*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
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return (0);
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}
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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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if (IOCGROUP(cmd) == 'i')
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return (ifioctl(so, cmd, data, p));
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if (IOCGROUP(cmd) == 'r')
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return (rtioctl(cmd, data, p));
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return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p));
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}
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int
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soo_poll(fp, events, cred, p)
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struct file *fp;
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int events;
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struct ucred *cred;
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struct proc *p;
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{
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struct socket *so = (struct socket *)fp->f_data;
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return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p);
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}
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int
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soo_stat(so, ub)
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register struct socket *so;
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register struct stat *ub;
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{
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bzero((caddr_t)ub, sizeof (*ub));
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ub->st_mode = S_IFSOCK;
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return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
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}
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/* ARGSUSED */
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static int
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soo_close(fp, p)
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struct file *fp;
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struct proc *p;
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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((struct socket *)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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