sys_socket.c revision 45311 
1/*
2 * Copyright (c) 1982, 1986, 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)sys_socket.c	8.1 (Berkeley) 6/10/93
34 * $Id: sys_socket.c,v 1.23 1999/02/01 21:16:29 newton Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/file.h>
40#include <sys/protosw.h>
41#include <sys/socket.h>
42#include <sys/socketvar.h>
43#include <sys/filio.h>			/* XXX */
44#include <sys/sockio.h>
45#include <sys/stat.h>
46#include <sys/uio.h>
47#include <sys/filedesc.h>
48
49#include <net/if.h>
50#include <net/route.h>
51
52struct	fileops socketops =
53    { soo_read, soo_write, soo_ioctl, soo_poll, soo_close };
54
55/* ARGSUSED */
56int
57soo_read(fp, uio, cred, flags)
58	struct file *fp;
59	struct uio *uio;
60	struct ucred *cred;
61	int flags;
62{
63	struct socket *so = (struct socket *)fp->f_data;
64	return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
65}
66
67/* ARGSUSED */
68int
69soo_write(fp, uio, cred, flags)
70	struct file *fp;
71	struct uio *uio;
72	struct ucred *cred;
73	int flags;
74{
75	struct socket *so = (struct socket *)fp->f_data;
76	return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0,
77						    uio->uio_procp);
78}
79
80int
81soo_ioctl(fp, cmd, data, p)
82	struct file *fp;
83	u_long cmd;
84	register caddr_t data;
85	struct proc *p;
86{
87	register struct socket *so = (struct socket *)fp->f_data;
88
89	switch (cmd) {
90
91	case FIONBIO:
92		if (*(int *)data)
93			so->so_state |= SS_NBIO;
94		else
95			so->so_state &= ~SS_NBIO;
96		return (0);
97
98	case FIOASYNC:
99		if (*(int *)data) {
100			so->so_state |= SS_ASYNC;
101			so->so_rcv.sb_flags |= SB_ASYNC;
102			so->so_snd.sb_flags |= SB_ASYNC;
103		} else {
104			so->so_state &= ~SS_ASYNC;
105			so->so_rcv.sb_flags &= ~SB_ASYNC;
106			so->so_snd.sb_flags &= ~SB_ASYNC;
107		}
108		return (0);
109
110	case FIONREAD:
111		*(int *)data = so->so_rcv.sb_cc;
112		return (0);
113
114	case FIOSETOWN:
115		return (fsetown(*(int *)data, &so->so_sigio));
116
117	case FIOGETOWN:
118		*(int *)data = fgetown(so->so_sigio);
119		return (0);
120
121	case SIOCSPGRP:
122		return (fsetown(-(*(int *)data), &so->so_sigio));
123
124	case SIOCGPGRP:
125		*(int *)data = -fgetown(so->so_sigio);
126		return (0);
127
128	case SIOCATMARK:
129		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
130		return (0);
131	}
132	/*
133	 * Interface/routing/protocol specific ioctls:
134	 * interface and routing ioctls should have a
135	 * different entry since a socket's unnecessary
136	 */
137	if (IOCGROUP(cmd) == 'i')
138		return (ifioctl(so, cmd, data, p));
139	if (IOCGROUP(cmd) == 'r')
140		return (rtioctl(cmd, data, p));
141	return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p));
142}
143
144int
145soo_poll(fp, events, cred, p)
146	struct file *fp;
147	int events;
148	struct ucred *cred;
149	struct proc *p;
150{
151	struct socket *so = (struct socket *)fp->f_data;
152	return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p);
153}
154
155int
156soo_stat(so, ub)
157	register struct socket *so;
158	register struct stat *ub;
159{
160
161	bzero((caddr_t)ub, sizeof (*ub));
162	ub->st_mode = S_IFSOCK;
163	return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
164}
165
166/* ARGSUSED */
167int
168soo_close(fp, p)
169	struct file *fp;
170	struct proc *p;
171{
172	int error = 0;
173
174	if (fp->f_data)
175		error = soclose((struct socket *)fp->f_data);
176	fp->f_data = 0;
177	return (error);
178}
179