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/* $OpenBSD: sys_socket.c,v 1.25 2016/11/22 12:11:38 mpi Exp $ */
/* $NetBSD: sys_socket.c,v 1.13 1995/08/12 23:59:09 mycroft Exp $ */
/*
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/file.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/stat.h>
#include <net/if.h>
#include <net/route.h>
struct fileops socketops = {
soo_read, soo_write, soo_ioctl, soo_poll, soo_kqfilter,
soo_stat, soo_close
};
int
soo_read(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
{
return (soreceive((struct socket *)fp->f_data, (struct mbuf **)NULL,
uio, (struct mbuf **)NULL, (struct mbuf **)NULL, (int *)NULL,
(socklen_t)0));
}
int
soo_write(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
{
return (sosend((struct socket *)fp->f_data, (struct mbuf *)NULL,
uio, (struct mbuf *)NULL, (struct mbuf *)NULL, 0));
}
int
soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct proc *p)
{
struct socket *so = (struct socket *)fp->f_data;
int s, error = 0;
switch (cmd) {
case FIONBIO:
if (*(int *)data)
so->so_state |= SS_NBIO;
else
so->so_state &= ~SS_NBIO;
return (0);
case FIOASYNC:
if (*(int *)data) {
so->so_state |= SS_ASYNC;
so->so_rcv.sb_flags |= SB_ASYNC;
so->so_snd.sb_flags |= SB_ASYNC;
} else {
so->so_state &= ~SS_ASYNC;
so->so_rcv.sb_flags &= ~SB_ASYNC;
so->so_snd.sb_flags &= ~SB_ASYNC;
}
return (0);
case FIONREAD:
*(int *)data = so->so_rcv.sb_datacc;
return (0);
case SIOCSPGRP:
so->so_pgid = *(int *)data;
so->so_siguid = p->p_ucred->cr_ruid;
so->so_sigeuid = p->p_ucred->cr_uid;
return (0);
case SIOCGPGRP:
*(int *)data = so->so_pgid;
return (0);
case SIOCATMARK:
*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
return (0);
}
/*
* Interface/routing/protocol specific ioctls:
* interface and routing ioctls should have a
* different entry since a socket's unnecessary
*/
if (IOCGROUP(cmd) == 'i') {
s = splsoftnet();
error = ifioctl(so, cmd, data, p);
splx(s);
return (error);
}
if (IOCGROUP(cmd) == 'r')
return (EOPNOTSUPP);
s = splsoftnet();
error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
(struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)NULL, p));
splx(s);
return (error);
}
int
soo_poll(struct file *fp, int events, struct proc *p)
{
struct socket *so = fp->f_data;
int revents = 0;
int s;
s = splsoftnet();
if (events & (POLLIN | POLLRDNORM)) {
if (soreadable(so))
revents |= events & (POLLIN | POLLRDNORM);
}
/* NOTE: POLLHUP and POLLOUT/POLLWRNORM are mutually exclusive */
if (so->so_state & SS_ISDISCONNECTED) {
revents |= POLLHUP;
} else if (events & (POLLOUT | POLLWRNORM)) {
if (sowriteable(so))
revents |= events & (POLLOUT | POLLWRNORM);
}
if (events & (POLLPRI | POLLRDBAND)) {
if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
revents |= events & (POLLPRI | POLLRDBAND);
}
if (revents == 0) {
if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) {
selrecord(p, &so->so_rcv.sb_sel);
so->so_rcv.sb_flagsintr |= SB_SEL;
}
if (events & (POLLOUT | POLLWRNORM)) {
selrecord(p, &so->so_snd.sb_sel);
so->so_snd.sb_flagsintr |= SB_SEL;
}
}
splx(s);
return (revents);
}
int
soo_stat(struct file *fp, struct stat *ub, struct proc *p)
{
struct socket *so = fp->f_data;
int s;
memset(ub, 0, sizeof (*ub));
ub->st_mode = S_IFSOCK;
if ((so->so_state & SS_CANTRCVMORE) == 0 ||
so->so_rcv.sb_cc != 0)
ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
if ((so->so_state & SS_CANTSENDMORE) == 0)
ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
ub->st_uid = so->so_euid;
ub->st_gid = so->so_egid;
s = splsoftnet();
(void) ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
(struct mbuf *)ub, NULL, NULL, p));
splx(s);
return (0);
}
int
soo_close(struct file *fp, struct proc *p)
{
int error = 0;
if (fp->f_data)
error = soclose(fp->f_data);
fp->f_data = 0;
return (error);
}
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