sys_socket.c revision 27845 
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 1.13 1997/04/27 20:00:42 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_select, 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}
80
81int
82soo_ioctl(fp, cmd, data, p)
83	struct file *fp;
84	int cmd;
85	register caddr_t data;
86	struct proc *p;
87{
88	register struct socket *so = (struct socket *)fp->f_data;
89
90	switch (cmd) {
91
92	case FIONBIO:
93		if (*(int *)data)
94			so->so_state |= SS_NBIO;
95		else
96			so->so_state &= ~SS_NBIO;
97		return (0);
98
99	case FIOASYNC:
100		if (*(int *)data) {
101			so->so_state |= SS_ASYNC;
102			so->so_rcv.sb_flags |= SB_ASYNC;
103			so->so_snd.sb_flags |= SB_ASYNC;
104		} else {
105			so->so_state &= ~SS_ASYNC;
106			so->so_rcv.sb_flags &= ~SB_ASYNC;
107			so->so_snd.sb_flags &= ~SB_ASYNC;
108		}
109		return (0);
110
111	case FIONREAD:
112		*(int *)data = so->so_rcv.sb_cc;
113		return (0);
114
115	case SIOCSPGRP:
116		so->so_pgid = *(int *)data;
117		return (0);
118
119	case SIOCGPGRP:
120		*(int *)data = so->so_pgid;
121		return (0);
122
123	case SIOCATMARK:
124		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
125		return (0);
126	}
127	/*
128	 * Interface/routing/protocol specific ioctls:
129	 * interface and routing ioctls should have a
130	 * different entry since a socket's unnecessary
131	 */
132	if (IOCGROUP(cmd) == 'i')
133		return (ifioctl(so, cmd, data, p));
134	if (IOCGROUP(cmd) == 'r')
135		return (rtioctl(cmd, data, p));
136	return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p));
137}
138
139int
140soo_select(fp, which, p)
141	struct file *fp;
142	int which;
143	struct proc *p;
144{
145	struct socket *so = (struct socket *)fp->f_data;
146	return so->so_proto->pr_usrreqs->pru_soselect(so, which, p);
147}
148
149int
150soo_stat(so, ub)
151	register struct socket *so;
152	register struct stat *ub;
153{
154
155	bzero((caddr_t)ub, sizeof (*ub));
156	ub->st_mode = S_IFSOCK;
157	return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
158}
159
160/* ARGSUSED */
161static int
162soo_close(fp, p)
163	struct file *fp;
164	struct proc *p;
165{
166	int error = 0;
167
168	if (fp->f_data)
169		error = soclose((struct socket *)fp->f_data);
170	fp->f_data = 0;
171	return (error);
172}
173