sys_socket.c revision 43408 
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 1.19 1998/11/11 10:03:56 truckman 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
52int soo_read __P((struct file *fp, struct uio *uio,
53		struct ucred *cred));
54int soo_write __P((struct file *fp, struct uio *uio,
55		struct ucred *cred));
56int soo_close __P((struct file *fp, struct proc *p));
57
58struct	fileops socketops =
59    { soo_read, soo_write, soo_ioctl, soo_poll, soo_close };
60
61/* ARGSUSED */
62int
63soo_read(fp, uio, cred)
64	struct file *fp;
65	struct uio *uio;
66	struct ucred *cred;
67{
68	struct socket *so = (struct socket *)fp->f_data;
69	return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
70}
71
72/* ARGSUSED */
73int
74soo_write(fp, uio, cred)
75	struct file *fp;
76	struct uio *uio;
77	struct ucred *cred;
78{
79	struct socket *so = (struct socket *)fp->f_data;
80	return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0,
81						    uio->uio_procp);
82}
83
84int
85soo_ioctl(fp, cmd, data, p)
86	struct file *fp;
87	u_long cmd;
88	register caddr_t data;
89	struct proc *p;
90{
91	register struct socket *so = (struct socket *)fp->f_data;
92
93	switch (cmd) {
94
95	case FIONBIO:
96		if (*(int *)data)
97			so->so_state |= SS_NBIO;
98		else
99			so->so_state &= ~SS_NBIO;
100		return (0);
101
102	case FIOASYNC:
103		if (*(int *)data) {
104			so->so_state |= SS_ASYNC;
105			so->so_rcv.sb_flags |= SB_ASYNC;
106			so->so_snd.sb_flags |= SB_ASYNC;
107		} else {
108			so->so_state &= ~SS_ASYNC;
109			so->so_rcv.sb_flags &= ~SB_ASYNC;
110			so->so_snd.sb_flags &= ~SB_ASYNC;
111		}
112		return (0);
113
114	case FIONREAD:
115		*(int *)data = so->so_rcv.sb_cc;
116		return (0);
117
118	case FIOSETOWN:
119		return (fsetown(*(int *)data, &so->so_sigio));
120
121	case FIOGETOWN:
122		*(int *)data = fgetown(so->so_sigio);
123		return (0);
124
125	case SIOCSPGRP:
126		return (fsetown(-(*(int *)data), &so->so_sigio));
127
128	case SIOCGPGRP:
129		*(int *)data = -fgetown(so->so_sigio);
130		return (0);
131
132	case SIOCATMARK:
133		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
134		return (0);
135	}
136	/*
137	 * Interface/routing/protocol specific ioctls:
138	 * interface and routing ioctls should have a
139	 * different entry since a socket's unnecessary
140	 */
141	if (IOCGROUP(cmd) == 'i')
142		return (ifioctl(so, cmd, data, p));
143	if (IOCGROUP(cmd) == 'r')
144		return (rtioctl(cmd, data, p));
145	return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p));
146}
147
148int
149soo_poll(fp, events, cred, p)
150	struct file *fp;
151	int events;
152	struct ucred *cred;
153	struct proc *p;
154{
155	struct socket *so = (struct socket *)fp->f_data;
156	return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p);
157}
158
159int
160soo_stat(so, ub)
161	register struct socket *so;
162	register struct stat *ub;
163{
164
165	bzero((caddr_t)ub, sizeof (*ub));
166	ub->st_mode = S_IFSOCK;
167	return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
168}
169
170/* ARGSUSED */
171int
172soo_close(fp, p)
173	struct file *fp;
174	struct proc *p;
175{
176	int error = 0;
177
178	if (fp->f_data)
179		error = soclose((struct socket *)fp->f_data);
180	fp->f_data = 0;
181	return (error);
182}
183