sys_socket.c revision 3308 
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 1.3 1994/08/02 07:42:42 davidg Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/proc.h>
40#include <sys/file.h>
41#include <sys/mbuf.h>
42#include <sys/protosw.h>
43#include <sys/socket.h>
44#include <sys/stat.h>
45#include <sys/socketvar.h>
46#include <sys/ioctl.h>
47#include <sys/stat.h>
48
49#include <net/if.h>
50#include <net/route.h>
51
52struct	fileops socketops =
53    { soo_read, soo_write, soo_ioctl, soo_select, soo_close };
54
55/* ARGSUSED */
56int
57soo_read(fp, uio, cred)
58	struct file *fp;
59	struct uio *uio;
60	struct ucred *cred;
61{
62
63	return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
64		uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
65}
66
67/* ARGSUSED */
68int
69soo_write(fp, uio, cred)
70	struct file *fp;
71	struct uio *uio;
72	struct ucred *cred;
73{
74
75	return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
76		uio, (struct mbuf *)0, (struct mbuf *)0, 0));
77}
78
79int
80soo_ioctl(fp, cmd, data, p)
81	struct file *fp;
82	int cmd;
83	register caddr_t data;
84	struct proc *p;
85{
86	register struct socket *so = (struct socket *)fp->f_data;
87
88	switch (cmd) {
89
90	case FIONBIO:
91		if (*(int *)data)
92			so->so_state |= SS_NBIO;
93		else
94			so->so_state &= ~SS_NBIO;
95		return (0);
96
97	case FIOASYNC:
98		if (*(int *)data) {
99			so->so_state |= SS_ASYNC;
100			so->so_rcv.sb_flags |= SB_ASYNC;
101			so->so_snd.sb_flags |= SB_ASYNC;
102		} else {
103			so->so_state &= ~SS_ASYNC;
104			so->so_rcv.sb_flags &= ~SB_ASYNC;
105			so->so_snd.sb_flags &= ~SB_ASYNC;
106		}
107		return (0);
108
109	case FIONREAD:
110		*(int *)data = so->so_rcv.sb_cc;
111		return (0);
112
113	case SIOCSPGRP:
114		so->so_pgid = *(int *)data;
115		return (0);
116
117	case SIOCGPGRP:
118		*(int *)data = so->so_pgid;
119		return (0);
120
121	case SIOCATMARK:
122		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
123		return (0);
124	}
125	/*
126	 * Interface/routing/protocol specific ioctls:
127	 * interface and routing ioctls should have a
128	 * different entry since a socket's unnecessary
129	 */
130	if (IOCGROUP(cmd) == 'i')
131		return (ifioctl(so, cmd, data, p));
132	if (IOCGROUP(cmd) == 'r')
133		return (rtioctl(cmd, data, p));
134	return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
135	    (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
136}
137
138int
139soo_select(fp, which, p)
140	struct file *fp;
141	int which;
142	struct proc *p;
143{
144	register struct socket *so = (struct socket *)fp->f_data;
145	register int s = splnet();
146
147	switch (which) {
148
149	case FREAD:
150		if (soreadable(so)) {
151			splx(s);
152			return (1);
153		}
154		selrecord(p, &so->so_rcv.sb_sel);
155		so->so_rcv.sb_flags |= SB_SEL;
156		break;
157
158	case FWRITE:
159		if (sowriteable(so)) {
160			splx(s);
161			return (1);
162		}
163		selrecord(p, &so->so_snd.sb_sel);
164		so->so_snd.sb_flags |= SB_SEL;
165		break;
166
167	case 0:
168		if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
169			splx(s);
170			return (1);
171		}
172		selrecord(p, &so->so_rcv.sb_sel);
173		so->so_rcv.sb_flags |= SB_SEL;
174		break;
175	}
176	splx(s);
177	return (0);
178}
179
180int
181soo_stat(so, ub)
182	register struct socket *so;
183	register struct stat *ub;
184{
185
186	bzero((caddr_t)ub, sizeof (*ub));
187	ub->st_mode = S_IFSOCK;
188	return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
189	    (struct mbuf *)ub, (struct mbuf *)0,
190	    (struct mbuf *)0));
191}
192
193/* ARGSUSED */
194int
195soo_close(fp, p)
196	struct file *fp;
197	struct proc *p;
198{
199	int error = 0;
200
201	if (fp->f_data)
202		error = soclose((struct socket *)fp->f_data);
203	fp->f_data = 0;
204	return (error);
205}
206