sys_socket.c revision 25201 
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 1.12 1997/03/24 11:52:26 bde Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/queue.h>
39#include <sys/systm.h>
40#include <sys/proc.h>
41#include <sys/fcntl.h>
42#include <sys/file.h>
43#include <sys/mbuf.h>
44#include <sys/protosw.h>
45#include <sys/socket.h>
46#include <sys/stat.h>
47#include <sys/socketvar.h>
48#include <sys/filio.h>			/* XXX */
49#include <sys/sockio.h>
50#include <sys/stat.h>
51
52#include <net/if.h>
53#include <net/route.h>
54
55static int soo_read __P((struct file *fp, struct uio *uio,
56		struct ucred *cred));
57static int soo_write __P((struct file *fp, struct uio *uio,
58		struct ucred *cred));
59static int soo_close __P((struct file *fp, struct proc *p));
60
61struct	fileops socketops =
62    { soo_read, soo_write, soo_ioctl, soo_select, soo_close };
63
64/* ARGSUSED */
65static int
66soo_read(fp, uio, cred)
67	struct file *fp;
68	struct uio *uio;
69	struct ucred *cred;
70{
71	struct socket *so = (struct socket *)fp->f_data;
72	return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
73}
74
75/* ARGSUSED */
76static int
77soo_write(fp, uio, cred)
78	struct file *fp;
79	struct uio *uio;
80	struct ucred *cred;
81{
82	struct socket *so = (struct socket *)fp->f_data;
83	return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0);
84}
85
86int
87soo_ioctl(fp, cmd, data, p)
88	struct file *fp;
89	int cmd;
90	register caddr_t data;
91	struct proc *p;
92{
93	register struct socket *so = (struct socket *)fp->f_data;
94
95	switch (cmd) {
96
97	case FIONBIO:
98		if (*(int *)data)
99			so->so_state |= SS_NBIO;
100		else
101			so->so_state &= ~SS_NBIO;
102		return (0);
103
104	case FIOASYNC:
105		if (*(int *)data) {
106			so->so_state |= SS_ASYNC;
107			so->so_rcv.sb_flags |= SB_ASYNC;
108			so->so_snd.sb_flags |= SB_ASYNC;
109		} else {
110			so->so_state &= ~SS_ASYNC;
111			so->so_rcv.sb_flags &= ~SB_ASYNC;
112			so->so_snd.sb_flags &= ~SB_ASYNC;
113		}
114		return (0);
115
116	case FIONREAD:
117		*(int *)data = so->so_rcv.sb_cc;
118		return (0);
119
120	case SIOCSPGRP:
121		so->so_pgid = *(int *)data;
122		return (0);
123
124	case SIOCGPGRP:
125		*(int *)data = so->so_pgid;
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_select(fp, which, p)
146	struct file *fp;
147	int which;
148	struct proc *p;
149{
150	struct socket *so = (struct socket *)fp->f_data;
151	return so->so_proto->pr_usrreqs->pru_soselect(so, which, p);
152}
153
154int
155soo_stat(so, ub)
156	register struct socket *so;
157	register struct stat *ub;
158{
159
160	bzero((caddr_t)ub, sizeof (*ub));
161	ub->st_mode = S_IFSOCK;
162	return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
163}
164
165/* ARGSUSED */
166static int
167soo_close(fp, p)
168	struct file *fp;
169	struct proc *p;
170{
171	int error = 0;
172
173	if (fp->f_data)
174		error = soclose((struct socket *)fp->f_data);
175	fp->f_data = 0;
176	return (error);
177}
178