sys_socket.c revision 51418 
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 * $FreeBSD: head/sys/kern/sys_socket.c 51418 1999-09-19 17:00:25Z green $
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, p)
58	struct file *fp;
59	struct uio *uio;
60	struct ucred *cred;
61	struct proc *p;
62	int flags;
63{
64	struct socket *so = (struct socket *)fp->f_data;
65	return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
66}
67
68/* ARGSUSED */
69int
70soo_write(fp, uio, cred, flags, p)
71	struct file *fp;
72	struct uio *uio;
73	struct ucred *cred;
74	struct proc *p;
75	int flags;
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	u_long 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 FIOSETOWN:
117		return (fsetown(*(int *)data, &so->so_sigio));
118
119	case FIOGETOWN:
120		*(int *)data = fgetown(so->so_sigio);
121		return (0);
122
123	case SIOCSPGRP:
124		return (fsetown(-(*(int *)data), &so->so_sigio));
125
126	case SIOCGPGRP:
127		*(int *)data = -fgetown(so->so_sigio);
128		return (0);
129
130	case SIOCATMARK:
131		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
132		return (0);
133	}
134	/*
135	 * Interface/routing/protocol specific ioctls:
136	 * interface and routing ioctls should have a
137	 * different entry since a socket's unnecessary
138	 */
139	if (IOCGROUP(cmd) == 'i')
140		return (ifioctl(so, cmd, data, p));
141	if (IOCGROUP(cmd) == 'r')
142		return (rtioctl(cmd, data, p));
143	return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p));
144}
145
146int
147soo_poll(fp, events, cred, p)
148	struct file *fp;
149	int events;
150	struct ucred *cred;
151	struct proc *p;
152{
153	struct socket *so = (struct socket *)fp->f_data;
154	return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p);
155}
156
157int
158soo_stat(so, ub)
159	register struct socket *so;
160	register struct stat *ub;
161{
162
163	bzero((caddr_t)ub, sizeof (*ub));
164	ub->st_mode = S_IFSOCK;
165	return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
166}
167
168/* ARGSUSED */
169int
170soo_close(fp, p)
171	struct file *fp;
172	struct proc *p;
173{
174	int error = 0;
175
176	fp->f_ops = &badfileops;
177	if (fp->f_data)
178		error = soclose((struct socket *)fp->f_data);
179	fp->f_data = 0;
180	return (error);
181}
182