sys_socket.c revision 29361 
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 1.15 1997/08/16 19:15:02 wollman 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
47#include <net/if.h>
48#include <net/route.h>
49
50static int soo_read __P((struct file *fp, struct uio *uio,
51		struct ucred *cred));
52static int soo_write __P((struct file *fp, struct uio *uio,
53		struct ucred *cred));
54static int soo_close __P((struct file *fp, struct proc *p));
55
56struct	fileops socketops =
57    { soo_read, soo_write, soo_ioctl, soo_poll, soo_close };
58
59/* ARGSUSED */
60static int
61soo_read(fp, uio, cred)
62	struct file *fp;
63	struct uio *uio;
64	struct ucred *cred;
65{
66	struct socket *so = (struct socket *)fp->f_data;
67	return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
68}
69
70/* ARGSUSED */
71static int
72soo_write(fp, uio, cred)
73	struct file *fp;
74	struct uio *uio;
75	struct ucred *cred;
76{
77	struct socket *so = (struct socket *)fp->f_data;
78	return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0,
79						    uio->uio_procp);
80}
81
82int
83soo_ioctl(fp, cmd, data, p)
84	struct file *fp;
85	int cmd;
86	register caddr_t data;
87	struct proc *p;
88{
89	register struct socket *so = (struct socket *)fp->f_data;
90
91	switch (cmd) {
92
93	case FIONBIO:
94		if (*(int *)data)
95			so->so_state |= SS_NBIO;
96		else
97			so->so_state &= ~SS_NBIO;
98		return (0);
99
100	case FIOASYNC:
101		if (*(int *)data) {
102			so->so_state |= SS_ASYNC;
103			so->so_rcv.sb_flags |= SB_ASYNC;
104			so->so_snd.sb_flags |= SB_ASYNC;
105		} else {
106			so->so_state &= ~SS_ASYNC;
107			so->so_rcv.sb_flags &= ~SB_ASYNC;
108			so->so_snd.sb_flags &= ~SB_ASYNC;
109		}
110		return (0);
111
112	case FIONREAD:
113		*(int *)data = so->so_rcv.sb_cc;
114		return (0);
115
116	case SIOCSPGRP:
117		so->so_pgid = *(int *)data;
118		return (0);
119
120	case SIOCGPGRP:
121		*(int *)data = so->so_pgid;
122		return (0);
123
124	case SIOCATMARK:
125		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
126		return (0);
127	}
128	/*
129	 * Interface/routing/protocol specific ioctls:
130	 * interface and routing ioctls should have a
131	 * different entry since a socket's unnecessary
132	 */
133	if (IOCGROUP(cmd) == 'i')
134		return (ifioctl(so, cmd, data, p));
135	if (IOCGROUP(cmd) == 'r')
136		return (rtioctl(cmd, data, p));
137	return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p));
138}
139
140int
141soo_poll(fp, events, cred, p)
142	struct file *fp;
143	int events;
144	struct ucred *cred;
145	struct proc *p;
146{
147	struct socket *so = (struct socket *)fp->f_data;
148	return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p);
149}
150
151int
152soo_stat(so, ub)
153	register struct socket *so;
154	register struct stat *ub;
155{
156
157	bzero((caddr_t)ub, sizeof (*ub));
158	ub->st_mode = S_IFSOCK;
159	return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
160}
161
162/* ARGSUSED */
163static int
164soo_close(fp, p)
165	struct file *fp;
166	struct proc *p;
167{
168	int error = 0;
169
170	if (fp->f_data)
171		error = soclose((struct socket *)fp->f_data);
172	fp->f_data = 0;
173	return (error);
174}
175