177 lines
4.7 KiB
C
177 lines
4.7 KiB
C
/* $OpenBSD: sys_socket.c,v 1.65 2024/04/30 17:59:15 mvs Exp $ */
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/* $NetBSD: sys_socket.c,v 1.13 1995/08/12 23:59:09 mycroft Exp $ */
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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 8.1 (Berkeley) 6/10/93
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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/proc.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/fcntl.h>
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#include <net/if.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_kqfilter = soo_kqfilter,
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.fo_stat = soo_stat,
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.fo_close = soo_close
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};
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int
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soo_read(struct file *fp, struct uio *uio, int fflags)
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{
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struct socket *so = (struct socket *)fp->f_data;
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int flags = 0;
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if (fp->f_flag & FNONBLOCK)
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flags |= MSG_DONTWAIT;
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return (soreceive(so, NULL, uio, NULL, NULL, &flags, 0));
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}
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int
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soo_write(struct file *fp, struct uio *uio, int fflags)
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{
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struct socket *so = (struct socket *)fp->f_data;
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int flags = 0;
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if (fp->f_flag & FNONBLOCK)
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flags |= MSG_DONTWAIT;
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return (sosend(so, NULL, uio, NULL, NULL, flags));
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}
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int
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soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct proc *p)
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{
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struct socket *so = (struct socket *)fp->f_data;
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switch (cmd) {
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case FIONBIO:
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break;
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case FIOASYNC:
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solock(so);
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mtx_enter(&so->so_rcv.sb_mtx);
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mtx_enter(&so->so_snd.sb_mtx);
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if (*(int *)data) {
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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_rcv.sb_flags &= ~SB_ASYNC;
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so->so_snd.sb_flags &= ~SB_ASYNC;
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}
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mtx_leave(&so->so_snd.sb_mtx);
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mtx_leave(&so->so_rcv.sb_mtx);
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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_datacc;
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break;
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case FIOSETOWN:
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case SIOCSPGRP:
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case TIOCSPGRP:
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return sigio_setown(&so->so_sigio, cmd, data);
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case FIOGETOWN:
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case SIOCGPGRP:
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case TIOCGPGRP:
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sigio_getown(&so->so_sigio, cmd, data);
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break;
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case SIOCATMARK:
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*(int *)data = (so->so_rcv.sb_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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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 (EOPNOTSUPP);
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return pru_control(so, cmd, data, NULL);
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}
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return (0);
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}
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int
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soo_stat(struct file *fp, struct stat *ub, struct proc *p)
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{
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struct socket *so = fp->f_data;
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memset(ub, 0, sizeof (*ub));
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ub->st_mode = S_IFSOCK;
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solock_shared(so);
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mtx_enter(&so->so_rcv.sb_mtx);
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if ((so->so_rcv.sb_state & SS_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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mtx_leave(&so->so_rcv.sb_mtx);
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if ((so->so_snd.sb_state & SS_CANTSENDMORE) == 0)
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ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
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ub->st_uid = so->so_euid;
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ub->st_gid = so->so_egid;
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(void)pru_sense(so, ub);
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sounlock_shared(so);
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return (0);
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}
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int
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soo_close(struct file *fp, struct proc *p)
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{
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int flags, error = 0;
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if (fp->f_data) {
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flags = (fp->f_flag & FNONBLOCK) ? MSG_DONTWAIT : 0;
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error = soclose(fp->f_data, flags);
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}
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fp->f_data = NULL;
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return (error);
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}
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